Abstract

An illustrative optical measurement system includes a light source configured to emit light directed at a target, an array of photodetectors configured to detect photons of the light after the light is scattered by the target, and a processing unit configured to measure a noise level of a photodetector included in the array of photodetectors, the noise level comprising a dark count rate that measures a dark count divided by a time period, determine that the noise level meets a predetermined threshold comprising a dark count rate threshold, and prevent, based on the determining that the noise level meets the predetermined threshold, an output of the photodetector from being used in generating a histogram based on a temporal distribution of photons detected by the array of photodetectors, the preventing comprising switching the output to a monitoring circuit that monitors a characteristic of the optical measurement system separate from the photodetector.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative multimodal measurement system includes a wearable assembly configured to be worn by a user; and a module configured to be removably inserted into the wearable assembly and comprising: a housing, a printed circuit board (PCB) and a light guide assembly configured to emit light directed at a target within the user. The light guide assembly comprises: a lower light guide portion housed within the housing and having a proximal end attached to the PCB, a conductive spring member housed within the housing and comprising a coil positioned around an external surface of the lower light guide portion, and a conductive upper light guide portion connected to the lower light guide portion and configured to protrude from an upper surface of the housing and be in contact with a surface of a body of the user.

IPC Classes  ?

• A61B 5/369 - Electroencephalography [EEG]
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/291 - Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]

Abstract

An illustrative optical measurement system includes a light source configured to emit light directed at a target. The optical measurement system further includes a photodetector configured to detect a photon of the light after the light is scattered by the target. The optical measurement system further includes a control circuit configured to receive a first input voltage that is a temperature-dependent voltage. The control circuit is further configured to receive a second input voltage that is a temperature-invariant voltage. The control circuit is further configured to output, based on a combination of the first input voltage and the second input voltage, a bias voltage for the photodetector, wherein the combination of the first and second input voltages is configured to cause the bias voltage to vary based on temperature.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative system may include a memory storing instructions and a processor communicatively coupled to the memory and configured to execute the instructions to: cause a signal to be applied to a component within an optical measurement system; generate, based on a response of the component to the signal, characterization data representative of a timing uncertainty associated with the component; and perform, based on the characterization data, an action associated with the component.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An optical measurement system comprising an optical source configured for delivering sample light in an anatomical structure, such that the sample light is scattered by the anatomical structure, resulting in physiological-encoded signal light that exits the anatomical structure, an optical detector configured for detecting the physiological-encoded signal light, and a processor configured for acquiring a TOF profile derived from the physiological-encoded signal light, the initial TOF profile having an initial contrast-to-noise ratio (CNR) between a plurality of states of a physiological activity in the anatomical structure. The processor is further configured for applying one or more weighting functions to the initial TOF profile to generate a weighted TOF profile having a subsequent CNR greater than the initial CNR between the plurality of states of the physiological activity. The processor is further configured for processing the weighted TOF profile, and identifying one of the plurality of states of the physiological activity.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative system may include a TDC configured to monitor for an occurrence of a photodetector output pulse during a measurement time window that is within and shorter in duration than a light pulse time period, the photodetector output pulse generated by a photodetector when the photodetector detects a photon from a light pulse having a light pulse time period; a PLL circuit for the TDC and having a PLL feedback period defined by a reference clock, the PLL circuit configured to: output a plurality of fine phase signals and output one or more signals representative of a plurality of feedback divider states during the PLL feedback period; and a precision timing circuit configured to adjust, based on one or more of the fine phase signals and/or the feedback divider states, a temporal position of the measurement time window within the light pulse time period.

IPC Classes  ?

• G06K 7/10 - Methods or arrangements for sensing record carriers by corpuscular radiation
• G02B 27/01 - Head-up displays

Abstract

An optical measurement system includes a wearable assembly comprising a first slot surrounded by a first wall, a second slot surrounded by a second wall, a first module configured to be inserted into the first slot, the first module comprising a first light source configured to emit first light directed at a brain of the user and a first set of detectors configured to detect first arrival times for photons of the first light after the first light is scattered by the brain, and a second module configured to be inserted into the second slot, the second module comprising a second light source configured to emit second light directed at the brain and a second set of detectors configured to detect second arrival times for photons of the second light after the second light is scattered by the brain.

IPC Classes  ?

• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• A63F 13/212 - Input arrangements for video game devices characterised by their sensors, purposes or types using sensors worn by the player, e.g. for measuring heart beat or leg activity
• A63F 13/67 - Generating or modifying game content before or while executing the game program, e.g. authoring tools specially adapted for game development or game-integrated level editor adaptively or by learning from player actions, e.g. skill level adjustment or by storing successful combat sequences for re-use

Abstract

An optical measurement system includes a wearable device configured to be worn on a body of a user and a position alignment system. The wearable device includes a support assembly and a wearable assembly supported by the support assembly. The wearable assembly includes a plurality of light sources configured to emit a plurality of light pulses toward a target within the body of the user and a plurality of detectors each configured to receive a set of photons included in a light pulse included in the plurality of light pulses after the set of photons is scattered by the target. The position alignment system is configured to facilitate positioning of the wearable assembly at a same position on the body of the user during different use sessions of the wearable device.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• G01S 17/04 - Systems determining the presence of a target
• G01S 17/88 - Lidar systems, specially adapted for specific applications
• G06F 1/16 - Constructional details or arrangements
• G06F 3/03 - Arrangements for converting the position or the displacement of a member into a coded form
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

A system comprises memory configured for storing an emotional response engine configured for predicting an emotional state set in response to an input of a real-life scenario that may occur in the context of a range of use of an AI control system. The system further comprises user interfaces (UIs) configured for presenting the real-life scenario to human subjects. The system further comprises at least one non-invasive brain interface assembly configured for detecting brain activity of the human subjects in response to presenting the real-life scenario to each of the human subjects. The system further comprises a processor configured for determining a plurality of emotional state sets respectively for the human subjects based on the detected brain activity of the respective human subject, and updating the emotional response engine based on the predicted emotional state set and the determined emotional state sets.

IPC Classes  ?

• G06N 20/00 - Machine learning
• G06N 5/022 - Knowledge engineering; Knowledge acquisition
• G16H 40/63 - ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation

Abstract

An illustrative calibration member made from a material that scatters light may be used to perform a calibration operation with respect to an optical measurement device having a plurality of light sources and a plurality of detectors distributed among a plurality of modules. The calibration member may form an exterior surface configured to support the optical measurement device and scatter photons of light emitted by the optical measurement device. The calibration operation may be performed based on arrival times of the scattered photons detected by the optical measurement device.

IPC Classes  ?

• G01J 1/04 - Optical or mechanical part

Abstract

z are amplitudes and ω is a frequency; directing the light source(s) to direct the light beams through the vapor cell(s); receiving signals from the detector(s); and determining three orthogonal components of the external magnetic field using the received signals. Multi-frequency modulation patterns can alternatively be used.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping

Abstract

An illustrative optical measurement system includes a light source configured to emit a light pulse directed at a target. The optical measurement system further includes a control circuit configured to drive the light source with a current pulse comprising a non-linear rise, and a decline from a maximum output to zero having a duration within a threshold percentage of a total pulse duration of the current pulse.

IPC Classes  ?

• G01J 1/08 - Arrangements of light sources specially adapted for photometry
• H01L 31/107 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier working in avalanche mode, e.g. avalanche photodiode
• G06F 1/16 - Constructional details or arrangements

Abstract

An illustrative system includes a brain interface system configured to be worn by a user and to output brain measurement data representative of brain activity of the user while the user is engaged in an electronic messaging session provided by an electronic messaging platform and a computing device configured to obtain the brain measurement data, determine, based on the brain measurement data, a graphical emotion symbol representative of a mental state of the user while the user is engaged in the electronic messaging session, and provide the graphical emotion symbol for use during the electronic messaging session.

IPC Classes  ?

• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• H04L 51/08 - Annexed information, e.g. attachments
• G06T 11/00 - 2D [Two Dimensional] image generation
• G06F 3/03 - Arrangements for converting the position or the displacement of a member into a coded form

Abstract

A headgear for magnetoencephalography includes a body defining a plurality of ports, where the body includes a first portion and a second portion; an adjustment mechanism coupled to the first portion and the second portion of the body and configured to adjust a separation between the first and second portion to facilitate fitting the headgear to a head of a user; and a plurality of optically pumped magnetometer (OPM) modules, where each of the OPM modules includes at least one vapor cell and is configured to be removably inserted into a one of the ports of the body, where each of the OPM modules is configured for coupling to a light source for receiving light.

IPC Classes  ?

• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative system includes a brain interface system configured to be worn by a user and to output brain measurement data representative of brain activity of the user while the user concurrently receives a wellness therapy and a computing device configured to obtain the brain measurement data, and modify, based on the brain measurement data, an attribute of the wellness therapy.

IPC Classes  ?

• A61N 1/36 - Applying electric currents by contact electrodes alternating or intermittent currents for stimulation, e.g. heart pace-makers
• A61N 1/04 - Electrodes
• G01R 33/02 - Measuring direction or magnitude of magnetic fields or magnetic flux
• G16H 40/63 - ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation

Abstract

A magnetic field measurement system includes a light source that emits a light beam; an optical fiber to transmit the light beam; a variable optical attenuator to increase stability of an intensity of the light beam; a beam splitter to divide the light beam into an OPM light beam and a monitor light beam; a monitor detector to detect the monitor light beam and generate a monitor signal; a vapor cell with alkali metal atoms disposed therein and configured for transmission of the OPM light beam through the vapor cell; an OPM detector to detect the OPM light beam after transmission through the vapor cell and generate an OPM signal; and a group delay filter to combine the monitor signal and the OPM signal to generate a reduced noise OPM signal, where the group delay filter accounts for a phase difference between the monitor signal and the OPM signal.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals

Abstract

An illustrative optical measurement system may include a primary controller; a plurality of secondary controllers communicatively coupled to the primary controller; and a plurality of modules, each module included in the plurality of modules comprising: a light source configured to emit light directed at a target, and a plurality of detectors configured to detect photon arrival times for the light after the light is scattered by the target; wherein: the plurality of modules is divided into a plurality of module subsets, and each module subset included in the plurality of module subsets is communicatively coupled to a respective secondary controller included in the plurality of secondary controllers.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative system includes a brain interface system configured to be worn by a user and to output brain activity data representative of brain activity of the user and a computing device configured to obtain the brain activity data, determine, based on the brain activity data, a characteristic of the user, and present, by way of a graphical user interface, graphical content representative of the characteristic.

IPC Classes  ?

• A61B 5/16 - Devices for psychotechnics; Testing reaction times
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/25 - Bioelectric electrodes therefor

Abstract

An illustrative system includes a hearing device configured to be worn by a user, the hearing device comprising an output transducer configured to present audio content to the user and an optical measurement system configured to output optical measurement data representative of one or more optical measurements performed with respect to the user.

IPC Classes  ?

• H04R 1/10 - Earpieces; Attachments therefor
• G01J 1/44 - Electric circuits

Abstract

An illustrative system includes a brain interface system configured to be worn by a user and to output brain activity data representative of brain activity of the user while the user concurrently plays an electronic game and a computing device configured to obtain the brain activity data and modify, based on the brain activity data, an attribute of the electronic game.

IPC Classes  ?

• A63F 13/212 - Input arrangements for video game devices characterised by their sensors, purposes or types using sensors worn by the player, e.g. for measuring heart beat or leg activity
• A63F 13/213 - Input arrangements for video game devices characterised by their sensors, purposes or types comprising photodetecting means, e.g. cameras, photodiodes or infrared cells
• A63F 13/25 - Output arrangements for video game devices
• A63F 13/30 - Interconnection arrangements between game servers and game devices; Interconnection arrangements between game devices; Interconnection arrangements between game servers
• A63F 13/67 - Generating or modifying game content before or while executing the game program, e.g. authoring tools specially adapted for game development or game-integrated level editor adaptively or by learning from player actions, e.g. skill level adjustment or by storing successful combat sequences for re-use
• A63F 13/69 - Generating or modifying game content before or while executing the game program, e.g. authoring tools specially adapted for game development or game-integrated level editor by enabling or updating specific game elements, e.g. unlocking hidden features, items, levels or versions
• A61B 5/16 - Devices for psychotechnics; Testing reaction times
• A61B 5/024 - Measuring pulse rate or heart rate
• A61B 5/053 - Measuring electrical impedance or conductance of a portion of the body
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• H01L 31/107 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier working in avalanche mode, e.g. avalanche photodiode

Abstract

An illustrative optical measurement system includes a light source configured to emit light directed at a target. The system further includes a detector configured to detect arrival times for photons of the light after the light is scattered by the target. The system further includes a temperature sensor configured to output a temperature signal representative of a temperature of the light source. The system further includes an optical sensor configured to output a power signal representative of an optical power level of the light emitted by the light source. The system further includes a driver circuit configured to output, based on the temperature signal and the power signal, an input current for the light source.

IPC Classes  ?

• A61B 5/16 - Devices for psychotechnics; Testing reaction times
• A61B 5/375 - Electroencephalography [EEG] using biofeedback
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative optical measurement device includes a light source configured to emit light pulses directed at a target of a user. The optical measurement device further includes a detector configured to detect arrival times for photons of the light pulses after the photons are scattered by the target. The optical measurement device further includes a processing unit configured to determine, while the optical measurement device is being worn by the user, an instrument response function (IRF) associated with the optical measurement device. The processing unit is further configured to generate, based on the arrival times of the photons at the detector, histogram data associated with the target. The processing unit is further configured to determine, based on the IRF and the histogram data, a property of the target.

IPC Classes  ?

• A61B 5/1495 - Calibrating or testing in vivo probes
• A61B 5/1455 - Measuring characteristics of blood in vivo, e.g. gas concentration, pH-value using optical sensors, e.g. spectral photometrical oximeters

Abstract

An illustrative system may include a component configured to be worn on a body of a user, the component comprising a time-to-digital converter (TDC) configured to: receive, during a predetermined event detection time window that commences in response to an application of a light pulse to a target within the body, a signal triggered by an event in which a photodetector detects a photon of the light pulse after the light pulse reflects from the target; and measure, based on the receiving the signal, a time interval between when the event occurred and an end of the predetermined event detection time window. The system may further include a processor configured to determine, based on the time interval and the predetermined event detection time window, an arrival time of the photon at the photodetector.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• H01L 31/107 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier working in avalanche mode, e.g. avalanche photodiode
• H01L 31/02 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof - Details

Abstract

A light intensity modulator includes an input optical fiber; an output optical fiber; an optical arrangement having a lens, where the optical arrangement is configured to receive light from the input optical fiber, pass the light through the lens, and direct the light to the output optical fiber; and a piezoelectric device coupled to the lens, where the piezoelectric device is configured for moving the lens to alter overlap of the output optical fiber and the light directed to the output optical fiber to modulate intensity of light in the output optical fiber.

IPC Classes  ?

• G02B 6/32 - Optical coupling means having lens focusing means
• H02N 2/04 - Constructional details
• G02B 6/42 - Coupling light guides with opto-electronic elements

Abstract

An illustrative optical measurement device includes a light source configured to emit light pulses directed at a target. The optical measurement device further includes a detector configured to detect arrival times for photons of the light pulses after the photons are scattered by the target. The optical measurement device further includes a processing unit configured to generate, based on the arrival times of the photons at the detector, histogram data associated with the target. The processing unit is further configured to determine, based on the histogram data, an absolute optical property associated with the target. The processing unit is further configured to determine, based on the absolute optical property, a blood oxygenation level of the user, and perform an operation based on the blood oxygenation level.

IPC Classes  ?

• A61B 5/1455 - Measuring characteristics of blood in vivo, e.g. gas concentration, pH-value using optical sensors, e.g. spectral photometrical oximeters
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/0205 - Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition

Abstract

A mental impairment detection system and non-invasive method of detecting mental impairment of a user are provided. A test (e.g., an inhibitory reflex test or a sustained attention test) is administered to the user, brain activity in a frontal lobe of the user is non-invasively detected while the test is administered to the user, and a level of mental impairment of the user is determined based on the brain activity detected in the frontal lobe of the user.

IPC Classes  ?

• G08B 23/00 - Alarms responsive to unspecified undesired or abnormal conditions
• A61B 5/16 - Devices for psychotechnics; Testing reaction times
• A61B 5/18 - Devices for psychotechnics; Testing reaction times for vehicle drivers
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/377 - Electroencephalography [EEG] using evoked responses
• A61B 3/113 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for determining or recording eye movement
• A61B 5/291 - Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]

Abstract

An exemplary system includes a PLL circuit and a precision timing circuit connected to the PLL circuit. The PLL circuit has a PLL feedback period defined by a reference clock and includes a voltage controlled oscillator configured to lock to the reference clock and having a plurality of stages configured to output a plurality of fine phase signals each having a different phase, and a feedback divider configured to be clocked by a single fine phase signal included in the plurality of fine phase signals and have a plurality of feedback divider states during the PLL feedback period. The precision timing circuit is configured to generate a timing pulse and set, based on a first combination of one of the fine phase signals and one of the feedback divider states, a temporal position of the timing pulse within the PLL feedback period.

IPC Classes  ?

• H03L 7/08 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop
• H03L 7/197 - Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
• H03L 7/18 - Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
• H03L 7/099 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
• G02B 27/01 - Head-up displays
• H03L 7/089 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses

Abstract

An illustrative system includes an extended reality system and a brain interface system configured to be concurrently worn by a user. The extended reality system is configured to provide the user with an extended reality experience and output a timing signal while the extended reality experience is being provided to the user, the timing signal representing a plurality of timing events that occur during the extended reality experience. The brain interface system is configured to receive the timing signal from the extended reality system while the extended reality experience is being provided to the user, acquire brain activity measurements while the extended reality experience is being provided to the user, and output measurement timestamp data representative of a temporal association of the brain activity measurements with the timing events.

IPC Classes  ?

• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer

Abstract

An illustrative system may include an extended reality system and a brain interface system configured to be concurrently worn by a user. The extended reality system may be configured to provide the user with an extended reality experience (e.g., an immersive virtual reality experience or a non-immersive augmented reality experience). The brain interface system may be configured to acquire one or more brain activity measurements while the extended reality experience is being provided to the user.

IPC Classes  ?

• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• G06F 3/16 - Sound input; Sound output
• H04L 7/00 - Arrangements for synchronising receiver with transmitter
• A61B 5/246 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals using evoked responses
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/291 - Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
• A61B 5/372 - Analysis of electroencephalograms
• A61B 5/38 - Acoustic or auditory stimuli

Abstract

An illustrative optical measurement system includes a light source configured to emit a light pulse directed at a target. The optical measurement system further includes a plurality of photodetectors configured to operate in accordance with an input bias voltage. The optical measurement system further includes a control circuit configured to identify a photodetector subset included in the plurality of photodetectors and that detects, while the input bias voltage has a first value, photons of the light pulse after the light pulse is scattered by the target. The control circuit is further configured to determine, based on the identifying of the photodetector subset, an overvoltage associated with the photodetector subset. The control circuit is further configured to update, based on the overvoltage, the input bias voltage for the plurality of photodetectors to have a second value.

IPC Classes  ?

• G01S 17/04 - Systems determining the presence of a target
• G01S 7/481 - Constructional features, e.g. arrangements of optical elements
• G01S 7/4861 - Circuits for detection, sampling, integration or read-out
• H01L 31/02 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof - Details
• H03M 1/12 - Analogue/digital converters

Abstract

An illustrative optical measurement system may include a wearable assembly comprising a plurality of modules each configured to fit within a different slot of the wearable assembly. The plurality of modules may include a module that comprises first and second light sources each configured to emit light directed at a target and a set of detectors configured to detect arrival times for photons of the light emitted by the first and second light sources. A ratio of a total number of the detectors to a total number of the light sources is at least two to one.

IPC Classes  ?

• G01J 1/02 - Photometry, e.g. photographic exposure meter - Details
• G01J 1/04 - Optical or mechanical part

Abstract

A non-invasive product customization system and a method of customizing a product formulation is provided. Brain activity of a user is detected in response to an input of a product formulation into a brain of the user via a sensory nervous system of the user. A mental state of the user is detected based on the detected brain activity. The product formulation is modified based on the determined mental state of the user. The modified product formulation may be presented to the user in a manner that modulates the mental state of the user.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G16H 20/90 - ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to alternative medicines, e.g. homeopathy or oriental medicines
• G16H 20/10 - ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to drugs or medications, e.g. for ensuring correct administration to patients
• A61B 5/16 - Devices for psychotechnics; Testing reaction times

Abstract

An exemplary magnetic field measurement system includes a wearable sensor unit that includes a magnetometer and a twisted pair cable interface assembly electrically connected to the magnetometer.

IPC Classes  ?

• G01R 33/00 - Arrangements or instruments for measuring magnetic variables
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• G01R 33/09 - Magneto-resistive devices
• H01F 7/20 - Electromagnets; Actuators including electromagnets without armatures
• H01F 27/28 - Coils; Windings; Conductive connections
• H01F 27/36 - Electric or magnetic shields or screens
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• A61B 5/05 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals

Abstract

An exemplary controller may include a single clock source configured to generate a single clock signal used to drive one or more components within a plurality of magnetometers and a plurality of differential signal measurement circuits configured to measure current output by a photodetector of each of the plurality of magnetometers.

IPC Classes  ?

• G01R 33/00 - Arrangements or instruments for measuring magnetic variables
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• G01R 33/09 - Magneto-resistive devices
• H01F 7/20 - Electromagnets; Actuators including electromagnets without armatures
• H01F 27/28 - Coils; Windings; Conductive connections
• H01F 27/36 - Electric or magnetic shields or screens
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• G01R 33/025 - Compensating stray fields
• A61B 5/05 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals

Abstract

A system for training a neurome that emulates a brain of a user comprises a non-invasive brain interface assembly configured for detecting neural activity of the user in response to analog instances of a plurality of stimuli peripherally input into the brain of the user from at least one source of content, memory configured for storing a neurome configured for outputting a plurality of determined brain states of an avatar in response to inputs of the digital instances of the plurality of stimuli, and a neurome training processor configured for determining a plurality of brain states of the user based on the detected neural activity of the user, and modifying the neurome based on the plurality of determined brain states of the user and the plurality of determined brain states of the avatar.

IPC Classes  ?

• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• G06N 20/00 - Machine learning
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• G06N 3/004 - Artificial life, i.e. computing arrangements simulating life
• G06N 3/006 - Artificial life, i.e. computing arrangements simulating life based on simulated virtual individual or collective life forms, e.g. social simulations or particle swarm optimisation [PSO]
• G06N 3/02 - Neural networks
• G06N 3/08 - Learning methods
• G06Q 30/0201 - Market modelling; Market analysis; Collecting market data
• A61B 5/16 - Devices for psychotechnics; Testing reaction times
• G06Q 30/0242 - Determining effectiveness of advertisements

Abstract

An illustrative method includes accessing, by a computing device, a model simulating light scattered by a simulated target, the model comprising a plurality of parameters. The method further includes generating, by the computing device, a set of possible histogram data using the model with a plurality of values for the parameters. The method further includes determining, by the computing device, a set of components that represent the set of possible histogram data, the set of components having a reduced dimensionality from the set of possible histogram data.

IPC Classes  ?

• G06V 10/14 - Optical characteristics of the device performing the acquisition or on the illumination arrangements
• G02B 27/01 - Head-up displays
• G06F 18/10 - Pre-processing; Data cleansing
• G06F 18/2132 - Feature extraction, e.g. by transforming the feature space; Summarisation; Mappings, e.g. subspace methods based on discrimination criteria, e.g. discriminant analysis
• G06F 18/2135 - Feature extraction, e.g. by transforming the feature space; Summarisation; Mappings, e.g. subspace methods based on approximation criteria, e.g. principal component analysis
• G06V 10/141 - Control of illumination
• G06V 10/147 - Optical characteristics of the device performing the acquisition or on the illumination arrangements - Details of sensors, e.g. sensor lenses
• G06V 10/50 - Extraction of image or video features by summing image-intensity values; Projection analysis
• G06V 10/75 - Image or video pattern matching; Proximity measures in feature spaces using context analysis; Selection of dictionaries

Abstract

A shielding arrangement for a magnetoencephalography (MEG) system includes a passively shielded enclosure having a plurality of walls defining the passively shielded enclosure, each of the plurality of walls including passive magnetic shielding material to reduce an ambient background magnetic field within the passively shielded enclosure; a vestibular wall extending from a first vertical wall to define, and at least partially separate, a vestibular area of the passively shielded enclosure adjacent the doorway and a user area of the passively shielded enclosure; and active shield coils distributed within the passively shielded enclosure and configured to further reduce the ambient background magnetic field within the user area of the passively shielded enclosure.

IPC Classes  ?

• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping

Abstract

A magnetocardiography (MCG) system includes a passively shielded enclosure having walls defining the passively shielded enclosure, each of the walls including passive magnetic shielding material to reduce an ambient background magnetic field within the passively shielded enclosure; an MCG measurement device including optically pumped magnetometers (OPMs); and active shield coils within the passively shielded enclosure and stationary relative to the passively shielded enclosure and the MCG measurement device, wherein the active shield coils are configured to further reduce the ambient background magnetic field within a user area of the passively shielded enclosure.

IPC Classes  ?

• A61B 5/243 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetocardiographic [MCG] signals
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01R 33/02 - Measuring direction or magnitude of magnetic fields or magnetic flux
• G01R 33/421 - Screening of main or gradient magnetic field

Abstract

A magnetic field recording system includes a headgear to be placed on a user; optically pumped magnetometers (OPMs) disposed in or on the headgear to detect magnetic fields; at least two sensing modalities selected from the following: i) a magnetic sensing modality, ii) an optical sensing modality, or iii) an inertial sensing modality; and a tracking unit configured to receive, from each of the at least two sensing modalities, a corresponding magnetic data stream, optical data stream, or inertial data stream and to track a position or orientation of the headgear or user; and a system controller configured to control operation of the OPMs and to receive, from the tracking unit, the position or orientation of the headgear or user.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/246 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals using evoked responses
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping

Abstract

A magnetic field recording system includes a headgear for a user; optically pumped magnetometers (OPMs) disposed in or on the headgear to detect magnetic fields and, in response to the detection, produce magnetic field data; at least one sensing modality including an optical sensing modality having at least one light source and at least one camera or light detector to receive light reflected or directed from the user and to produce an optical data stream; a tracking unit to receive the optical data stream and track a position or orientation of the headgear or user; a system controller to control operation of the OPMs and receive, from the tracking unit, the position or orientation of the headgear or user; and a processor to receive the optical data stream and the magnetic field data from the OPMs and analyze the magnetic field data using the optical data stream for validation.

IPC Classes  ?

• G01R 33/02 - Measuring direction or magnitude of magnetic fields or magnetic flux
• G01R 33/00 - Arrangements or instruments for measuring magnetic variables

Abstract

The source light having a range of optical wavelengths is split into sample light and reference light. The sample light is delivered into a sample, such that the sample light is scattered by the sample, resulting in signal light that exits the sample. The signal light and the reference light are combined into an interference light pattern having optical modes having oscillation frequency components respectively corresponding to optical pathlengths extending through the sample. Different sets of the optical modes of the interference light pattern are respectively detected, and high-bandwidth analog signals representative of the optical modes of the interference light pattern are output. The high-bandwidth analog signals are parallel processed, and mid-bandwidth digital signals are output. The mid-bandwidth digital signals are processed over an i number of iterations, and a plurality of low-bandwidth digital signals are output on the ith iteration. The sample is analyzed based on the low-bandwidth digital signals.

IPC Classes  ?

• G01B 9/02055 - Reduction or prevention of errors; Testing; Calibration
• G01B 9/02091 - Tomographic interferometers, e.g. based on optical coherence
• G01B 9/02 - Interferometers

Abstract

Source light having a range of optical wavelengths is generated. The source light is split into sample light and reference light. The sample light is delivered into a sample, such that it is scattered by the sample, resulting in signal light that exits the sample. The signal light and reference light are combined into an interference light pattern having optical modes. Different subsets of the optical modes of the interference light pattern are respectively detected, and high-bandwidth analog signals respectively corresponding to the different subsets of optical modes of the interference light pattern are output. At least one characteristic is extracted from each of the plurality of high-bandwidth analog signals, and low-bandwidth digital signals respectively comprising the extracted characteristics are output. The sample is analyzed based on the low-bandwidth digital signals.

IPC Classes  ?

• G01N 21/359 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01B 9/02091 - Tomographic interferometers, e.g. based on optical coherence

Abstract

An illustrative optical measurement system includes a light source configured to emit light directed at a target within a user. The system further includes a detector configured to detect photon arrival times for photons of the light after the light is scattered by the target. The system further includes a processor configured to determine, based on the photon arrival times, histogram data associated with the target, the histogram data including noise. The processor is further configured to determine, based on the photon arrival times, a random matrix corresponding to the photon arrival times. The processor is further configured to determine, based on the random matrix, a noise distribution representing a distribution of the noise within the histogram data. The processor is further configured to generate clean histogram data using the noise distribution to filter at least a portion of the noise from the histogram data.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G16H 40/67 - ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for remote operation

Abstract

A wearable module assembly for an optical measurement system includes a first wearable module, a second wearable module, and a connector. The first and second wearable modules each include a light source configured to emit a light pulse toward a target within a body of a user, a housing that houses the light source and the plurality of detectors and includes a substantially hexagonal surface that faces a surface of the body of the user when the wearable module assembly is worn by the user, and a plurality of detectors each positioned at a fixed distance from the first light source and each configured to detect a set of photons included in the light pulse after the set of photons are scattered by the target. The connector directly connects the first wearable module and the second wearable module at mutually-facing side surfaces of the respective housings.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/1455 - Measuring characteristics of blood in vivo, e.g. gas concentration, pH-value using optical sensors, e.g. spectral photometrical oximeters
• G01N 33/483 - Physical analysis of biological material

Abstract

An exemplary system includes a first photodetector configured to detect a first photon via a first path from a light source and a second photodetector configured to detect a second photon via a second path. The system includes a control system configured to record a first time based on the first photodetector detecting the first photon, the first time including a delay between the first photodetector detecting the first photon and the control system receiving a photodetector output pulse from the first photodetector. The control system is configured to record a second time based on the second photodetector detecting the second photon, the second time including a delay between the second photodetector and the control system. The control system is configured to determine, based on the first and second time, an amount of time for the second photon to travel from the light source to the second photodetector.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An exemplary system includes a light source and a control circuit configured to apply voltage having a first polarity to the light source for a first time period to provide a threshold charge for the light source to start an emission of a light pulse that is directed at a target within a body. The control circuit is further configured to apply voltage having a second polarity opposite the first polarity to the light source for a second time period subsequent to the first time period to discharge the light source to stop the emission of the light pulse.

IPC Classes  ?

• G01J 1/44 - Electric circuits
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• H01S 5/062 - Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes

Abstract

An exemplary optical measurement system includes a light source configured to emit light directed at a target. The optical measurement system further includes a photodetector configured to detect a photon of the light after the light is scattered by the target. The optical measurement system further includes a control circuit configured to receive a first input voltage that is a temperature-dependent voltage. The control circuit is further configured to receive a second input voltage that is a temperature-invariant voltage. The control circuit is further configured to output, based on a combination of the first input voltage and the second input voltage, a bias voltage for the photodetector, wherein the combination of the first and second input voltages is configured to cause the bias voltage to vary based on temperature.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An exemplary system includes a photodetector configured to generate a photodetector output pulse when the photodetector detects a photon from a light pulse having a light pulse time period, a TDC configured to monitor for the occurrence of the photodetector output pulse during a measurement time window that is within and shorter in duration than the light pulse time period, a PLL circuit for the TDC, and a precision timing circuit connected to the PLL circuit and configured to adjust, based on at least one signal generated within the PLL circuit, a temporal position of the measurement time window within the light pulse time period.

IPC Classes  ?

• G06K 7/10 - Methods or arrangements for sensing record carriers by corpuscular radiation
• G02B 27/01 - Head-up displays

Abstract

An illustrative optical measurement system includes a signal generator configured to generate a signal and a processing unit configured to direct the signal generator to apply the signal to a TDC included in the optical measurement system and generate, based on timestamp symbols recorded by the TDC in response to the signal, characterization data representative of a nonlinearity of the TDC.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative optical measurement system may include a wearable assembly configured to be worn by a user and comprising a plurality of light sources each configured to emit light directed at a target and a plurality of detectors configured to detect arrival times for photons of the light after the light is scattered by the target, wherein a ratio of a total number of the detectors to a total number of the light sources is at least two to one.

IPC Classes  ?

• G01J 1/02 - Photometry, e.g. photographic exposure meter - Details
• G01J 1/04 - Optical or mechanical part

Abstract

An illustrative optical measurement system includes a light source configured to emit, during a measurement session time period, a sequence of light pulses towards a target; a plurality of photodetectors configured to remain in an armed state during an entire duration of the measurement session time period, and detect, while in the armed state, photons of the light pulses after the light pulses are scattered by the target; and a plurality of time-to-digital converters (TDCs) comprising a different TDC for each photodetector of the plurality of photodetectors, the TDCs configured to record timestamp symbols representative of when the photons are detected by the photodetectors.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01J 1/42 - Photometry, e.g. photographic exposure meter using electric radiation detectors
• G01J 1/44 - Electric circuits
• G04F 10/00 - Apparatus for measuring unknown time intervals by electric means

Abstract

An illustrative optical measurement system includes a light source configured to emit light directed at a target. The optical measurement system further includes a photodetector configured to detect a photon of the light after the light is scattered by the target. The optical measurement system further includes a control circuit configured to arm the photodetector by applying a bias voltage to a first terminal of the photodetector and applying, for a predetermined amount of time using a current source, a current to a second terminal of the photodetector to produce a predetermined voltage difference across the photodetector.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An exemplary system includes a PLL circuit and a precision timing circuit connected to the PLL circuit. The PLL circuit has a PLL feedback period defined by a reference clock and includes a voltage controlled oscillator configured to lock to the reference clock and having a plurality of stages configured to output a plurality of fine phase signals each having a different phase, and a feedback divider configured to be clocked by a single fine phase signal included in the plurality of fine phase signals and have a plurality of feedback divider states during the PLL feedback period. The precision timing circuit is configured to generate a timing pulse and set, based on a first combination of one of the fine phase signals and one of the feedback divider states, a temporal position of the timing pulse within the PLL feedback period.

IPC Classes  ?

• H03L 7/08 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop
• H03L 7/099 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
• G02B 27/01 - Head-up displays
• H03L 7/089 - Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop - Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses
• H03L 7/197 - Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division

Abstract

An exemplary system includes a processor, a wearable device comprising a plurality of slots, and a first module including a plurality of detectors and a module control circuit. The processor is configured to successively transmit, to each slot of the plurality of slots, a command to enable a respective module located in each slot. The processor is further configured to determine, based on an acknowledgment received from the module control circuit, that the first module is enabled and located in a first slot, and to successively transmit, based on the determining that the first module is enabled and located in the first slot, a plurality of detector address identifiers. The module control circuit is configured to successively place the plurality of detectors into an enumeration mode in which each detector of the plurality of detectors is assigned a different detector address identifier of the plurality of detector address identifiers.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01J 1/42 - Photometry, e.g. photographic exposure meter using electric radiation detectors
• G01J 1/44 - Electric circuits

Abstract

An exemplary optical measurement system includes a signal generator configured to generate a signal and a processing unit configured to direct the signal generator to apply the signal to a component within the optical measurement system, generate, based on a response of the component to the signal, characterization data representative of a timing uncertainty associated with the component, and perform, based on the characterization data, an action associated with the component.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An exemplary system includes a photodetector configured to generate a plurality of photodetector output pulses over time as a plurality of light pulses are applied to and scattered by a target, a TPSF generation circuit configured to generate, based on the photodetector output pulses, a TPSF representative of a light pulse response of the target, and a control circuit configured to direct the TPSF generation circuit to selectively operate in different resolution modes.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01R 31/317 - Testing of digital circuits
• G01R 31/30 - Marginal testing, e.g. by varying supply voltage
• G01R 31/319 - Tester hardware, i.e. output processing circuits

Abstract

An exemplary optical measurement system described herein includes a control circuit configured to output a global bias voltage and a module communicatively coupled to the control circuit. The module includes a light source configured to emit light directed at a target. The module further includes a plurality of detectors configured to detect arrival times for photons of the light after the light is scattered by the target. The module further includes a module control circuit configured to receive the global bias voltage and output a plurality of detector bias voltages based on the global bias voltage. The plurality of detector bias voltages include a respective detector bias voltage for each detector of the plurality of detectors.

IPC Classes  ?

• G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• H04B 10/50 - Transmitters
• G01J 1/42 - Photometry, e.g. photographic exposure meter using electric radiation detectors
• G01J 1/44 - Electric circuits

Abstract

An illustrative system includes a wearable assembly configured to be worn by a user and comprising a first detector configured to detect a first set of photon arrival times and output a first signal representative of the first set of photon arrival times, and a second detector configured to detect a second set of photon arrival times and output a second signal representative of the second set of photon arrival times. The system further includes a processing unit configured to identify a first intensity change in the first signal, identify a second intensity change in the second signal, determine that the first and second intensity changes are time correlated, and determine, based on the determining that the first and second intensity changes are time correlated, that the first and second intensity changes are representative of a motion artifact caused by movement of the user.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative optical measurement system includes a light source configured to emit light directed at a target, an array of photodetectors configured to detect photons of the light after the light is scattered by the target, and a processing unit. The processing unit is configured to measure a noise level of a photodetector included in the array of photodetectors and determine that the noise level meets a predetermined threshold. The processing unit is further configured to prevent, based on the determining that the noise level meets the predetermined threshold, an output of the photodetector from being used in generating a histogram based on a temporal distribution of photons detected by the array of photodetectors.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative optical measurement system includes a light source configured to emit light directed at a target within a user, the target covered by a superficial layer, and an array of photodetectors configured to detect photons of the light after the light is scattered. The system further includes a processor configured to record, during a first and a second time period, a first and a second set of timestamp symbols, respectively, based on a first and a second subset of the array of photodetectors detecting a first subset of the photons that are scattered by the superficial layer and a second subset of the photons that are scattered by the target and the superficial layer, respectively. The processor is further configured to filter, based on the first set of histogram data, the second set of histogram data, and determine, based on the filtering, histogram data corresponding to the target.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

A system for training a neurome that emulates a brain of a user comprises a non-invasive brain interface assembly configured for detecting neural activity of the user in response to analog instances of a plurality of stimuli peripherally input into the brain of the user from at least one source of content, memory configured for storing a neurome configured for outputting a plurality of determined brain states of an avatar in response to inputs of the digital instances of the plurality of stimuli, and a neurome training processor configured for determining a plurality of brain states of the user based on the detected neural activity of the user, and modifying the neurome based on the plurality of determined brain states of the user and the plurality of determined brain states of the avatar.

IPC Classes  ?

• G06N 20/00 - Machine learning
• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G06N 3/00 - Computing arrangements based on biological models
• G06N 3/08 - Learning methods
• G06Q 30/02 - Marketing; Price estimation or determination; Fundraising
• G06N 3/02 - Neural networks
• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• A61B 5/16 - Devices for psychotechnics; Testing reaction times

Abstract

An exemplary wearable brain interface system includes a head-mountable component and a control system. The head-mountable component includes an array of photodetectors that includes a photodetector comprising a single-photon avalanche diode (SPAD) and a fast-gating circuit configured to arm and disarm the SPAD. The control system is for controlling a current drawn by the array of photodetectors.

IPC Classes  ?

• H01L 31/107 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier working in avalanche mode, e.g. avalanche photodiode
• H01L 27/144 - Devices controlled by radiation
• H01L 31/02 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof - Details

Abstract

An illustrative research support computing system maintains subject data representative of attributes for research subjects included in a potential subject pool for potential research studies. The system receives, from a client device, an input dataset representative of: 1) a set of parameters defining a research study to be conducted with respect to a research subject group, and 2) a set of criteria for research subjects that are to be included in the research subject group. The system designates a research subject included in the potential subject pool for inclusion in the research subject group based on the set of criteria, and receives research data detected for the research subject in accordance with the set of parameters. The system also provides an output dataset generated based on the research data detected for the research subject in accordance with the set of parameters. Corresponding methods and systems are also disclosed.

IPC Classes  ?

• G16H 10/20 - ICT specially adapted for the handling or processing of patient-related medical or healthcare data for electronic clinical trials or questionnaires
• G06Q 30/00 - Commerce
• G16H 80/00 - ICT specially adapted for facilitating communication between medical practitioners or patients, e.g. for collaborative diagnosis, therapy or health monitoring

Abstract

An optical measurement system includes a wearable device including a support assembly configured to be worn on a body of a user and a wearable assembly supported by the support assembly. The wearable assembly includes a plurality of light sources configured to emit a plurality of light pulses toward a target within the body of the user and a plurality of detectors each configured to receive a set of photons included in a light pulse included in the plurality of light pulses after the set of photons is scattered by the target. A position of the wearable assembly on the support assembly is adjustable.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• G01S 17/04 - Systems determining the presence of a target
• G01S 17/88 - Lidar systems, specially adapted for specific applications
• G06F 3/03 - Arrangements for converting the position or the displacement of a member into a coded form
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G06F 1/16 - Constructional details or arrangements

Abstract

An optical measurement system includes a wearable module having at least one time-resolved single photon photodetector configured to detect photons from at least one light pulse after the at least one light pulse is scattered by a target within a body of a user; at least one light guide configured to receive the photons and guide the photons to the at least one photodetector; and a housing that houses both the at least one photodetector and at least a portion of the at least one light guide. The optical measurement system further includes a signal processing circuit configured to determine a temporal distribution of the photons detected by the at least one photodetector and generate a histogram based on the temporal distribution of the photons.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

A wearable module for use in an optical measurement system may include a first light source configured to emit a first light pulse in a first wavelength, a second light source configured to emit a second light pulse in a second wavelength that is different from the first wavelength, a light guide configured to guide the first light pulse and the second light pulse toward a target within a body of a user; an optical member configured to receive the first light pulse from the first light source and the second light pulse from the second light source and direct the first light pulse and the second light pulse to the light guide, and a housing that houses the first light source, the second light source, and the optical member.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G02B 6/42 - Coupling light guides with opto-electronic elements

Abstract

A wearable module for use in an optical measurement system includes a light guide configured to receive a light pulse from a light source and guide signal photons included in the light pulse toward a target within a body of a user, and a light diverter configured to divert reference photons included in the light pulse toward at least one detector configured to detect the reference photons.

IPC Classes  ?

• A61B 5/1455 - Measuring characteristics of blood in vivo, e.g. gas concentration, pH-value using optical sensors, e.g. spectral photometrical oximeters
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative system includes a sensor component and a controller conductively coupled by way of a first wire and a second wire in a twisted pair configuration. The controller includes a driver configured to drive the sensor component by way of the first and second wires with a drive current in accordance with a gain parameter and a control loop circuit. The control loop circuit is configured to receive a control signal representative of a target current value for the drive current, adjust the gain parameter based on a difference between the target current value and an actual current value of current that is actually being driven through the sensor component, and abstain from adjusting the gain parameter based on current capacitively coupled onto the first and second wires by an external electric field.

IPC Classes  ?

• G01R 33/00 - Arrangements or instruments for measuring magnetic variables
• H01B 11/04 - Cables with twisted pairs or quads with pairs or quads mutually positioned to reduce cross-talk
• A61B 5/242 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents

Abstract

An optical measurement system includes a first wearable module comprising a first source configured to emit a first light pulse sequence comprising a plurality of light pulses and a first plurality of detectors configured to detect photons from the first light pulse sequence. The system further includes a second wearable module comprising a second source configured to emit a second light pulse sequence comprising a plurality of light pulses and that is time interleaved with the first light pulse sequence, and a second plurality of detectors configured to detect photons from the second light pulse sequence. The system further includes a control circuit configured to control light pulses emitted by the sources in accordance with time and/or frequency division multiplexing heuristics.

IPC Classes  ?

• A61B 5/1455 - Measuring characteristics of blood in vivo, e.g. gas concentration, pH-value using optical sensors, e.g. spectral photometrical oximeters
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative multimodal measurement system includes a wearable assembly configured to be worn by a user and comprising a plurality of light sources each configured to emit light directed at a target within the user, a plurality of detectors configured to detect arrival times for photons of the light after the light is scattered by the target, and a plurality of electrodes configured to be external to the user and detect electrical activity of the target.

IPC Classes  ?

• A61B 5/291 - Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
• A61B 5/369 - Electroencephalography [EEG]
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An illustrative biopotential measurement system includes a plurality of electrodes each configured to record a different signal included in a plurality of signals representative of electrical activity of a target within a user; a plurality of non-inverting operational amplifier circuits each connected to a different electrode included in the plurality of electrodes and each configured to output a different amplified signal included in a plurality of amplified signals representative of amplified versions of the plurality of signals; and a common-mode feedback circuit configured to measure a common-mode signal between the plurality of amplified signals and provide the common-mode signal to the non-inverting operational amplifier circuits. The non-inverting operational amplifier circuits are configured to use the common-mode signal to generate voltage-divided feedback signals used to generate the plurality of amplified signals.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• H03F 3/45 - Differential amplifiers
• A61B 5/28 - Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
• A61B 5/369 - Electroencephalography [EEG]
• A61B 5/318 - Heart-related electrical modalities, e.g. electrocardiography [ECG]
• A61B 5/398 - Electrooculography [EOG], e.g. detecting nystagmus; Electroretinography [ERG]
• A61B 5/389 - Electromyography [EMG]
• A61B 5/291 - Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
• A61B 5/296 - Bioelectric electrodes therefor specially adapted for particular uses for electromyography [EMG]
• A61B 5/297 - Bioelectric electrodes therefor specially adapted for particular uses for electroretinography [ERG]
• A61B 5/308 - Input circuits therefor specially adapted for particular uses for electrocardiography [ECG]
• A61B 5/31 - Input circuits therefor specially adapted for particular uses for electroencephalography [EEG]
• A61B 5/315 - Input circuits therefor specially adapted for particular uses for electroretinography [ERG]
• A61B 5/313 - Input circuits therefor specially adapted for particular uses for electromyography [EMG]

Abstract

An optical measurement system includes a first light source configured to emit a first light pulse toward a target, a second light source configured to emit a second light pulse toward the target, a first detector, a second detector, and a processing unit. The processing unit is configured to determine a plurality of temporal distributions of photons included in the first light pulse and the second light pulse and detected by the first detector and the second detector after the photons are scattered by the target. The processing unit is further configured to determine, based on the plurality of temporal distributions, a distance between the first light source and the second detector.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01B 11/14 - Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures

Abstract

A wearable module for use in an optical measurement system includes a housing including a top surface, a light guide including a distal end portion adapted to protrude from the top surface of the housing, and a spring member configured to bias the distal end portion of the light guide away from the top surface of the housing. The light guide is configured to receive, at the distal end portion, photons from a light pulse scattered by a target within a body of a user and guide the received photons toward a photodetector.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• G01J 1/04 - Optical or mechanical part
• G01J 1/42 - Photometry, e.g. photographic exposure meter using electric radiation detectors
• G01J 1/44 - Electric circuits

Abstract

An optical measurement system includes a wearable module assembly configured to be worn on a body of a user. The wearable module assembly includes a plurality of wearable modules and a connecting assembly. Each wearable module includes a light source configured to emit a light pulse toward a target within the body of the user and a plurality of detectors configured to receive photons included in the light pulse after the photons are scattered by the target. The connecting assembly physically and flexibly connects the plurality of wearable modules such that the wearable module assembly is conformable to a three-dimensional (3D) surface of the body of the user when the wearable module assembly is worn on the body of the user.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01N 33/483 - Physical analysis of biological material

Abstract

A mental state awareness system comprises a non-invasive brain interface assembly configured for detecting brain activity of a user, a processor configured for determining a mental state of a user based on the detected brain activity, and a biofeedback device configured for automatically providing biofeedback to the user indicative of the determined mental state of the user.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/16 - Devices for psychotechnics; Testing reaction times
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals

Abstract

An active shield magnetometry system comprises at least one magnetic field actuator configured for generating an actuated magnetic field that at least partially cancels an outside magnetic field, thereby yielding a total residual magnetic field. The active shield magnetometry system further comprises a plurality of magnetometers respectively configured for measuring the total residual magnetic field and outputting a plurality of total residual magnetic field measurements. The active shield magnetometry system further comprises at least one feedback control loop comprising at least one optimal linear controller configured for controlling the actuated magnetic field at least partially based on at least one of the plurality of total residual magnetic field measurements respectively output by at least one of the plurality of magnetometers.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals

Abstract

A calibration system for a magnetometer having an unknown gain is disclosed. A calibration magnetic field is generated at a calibration frequency of a known amplitude at the magnetometer. A measurement of the calibrating magnetic field is reported by the magnetometer. A ratio of an amplitude of the calibration magnetic field measurement reported by the magnetometer and the known amplitude of the calibrating magnetic field at the magnetometer is computed. The unknown gain of the magnetometer is determined at least partially based on computed ratio.

IPC Classes  ?

• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• G01R 35/00 - Testing or calibrating of apparatus covered by the other groups of this subclass
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An actuated magnetic field is generated at a plurality of distinct frequencies that at least partially cancels an outside magnetic field at the plurality of distinct frequencies, thereby yielding a total residual magnetic field. The total residual magnetic field is coarsely detected and a plurality of coarse error signals are respectively output. The total residual magnetic field is finely detected and a plurality of fine error signals are respectively output. The actuated magnetic field is controlled respectively at the plurality of distinct frequencies at least partially based on at least one of the plurality of coarse error signals, and finely controlled respectively at the plurality of distinct frequencies at least partially based on at least one of the plurality of fine error signals.

IPC Classes  ?

• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• A61B 5/248 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoneurographic [MNG] signals, e.g. magnetospinographic [MSG] signals

Abstract

At least one magnetic field actuator is configured for generating an actuated magnetic field that at least partially cancels an outside magnetic field, thereby yielding a total residual magnetic field. A plurality of magnetometers are configured for taking measurements of the total residual magnetic field. The magnetometers include a plurality of coarse magnetometers and a plurality of fine magnetometers. A processor is configured for acquiring the total residual magnetic field measurements from the coarse magnetometers, estimating the total residual magnetic field at the fine magnetometers based on total residual magnetic field measurements acquired from the plurality of coarse magnetometers, and controlling the actuated magnetic field at least partially based on the total residual magnetic field estimates at the fine magnetometers in a manner that suppresses the total residual magnetic field at the fine magnetometers to a baseline level, such that at least one of the fine magnetometers is in-range.

IPC Classes  ?

• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

A magnetic field measurement system includes at least one magnetometer having a vapor cell, a light source to direct light through the vapor cell, and a detector to receive light directed through the vapor cell; at least one magnetic field generator disposed adjacent the vapor cell; and a feedback circuit coupled to the at least one magnetic field generator and the detector of the at least one magnetometer. The feedback circuit includes a first feedback loop that includes a first low pass filter with a first cutoff frequency and a second feedback loop that includes a second low pass filter with a second cutoff frequency. The first and second feedback loops are configured to compensate for magnetic field variations having a frequency lower than the first or second cutoff frequency, respectively.

IPC Classes  ?

• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
• G01R 33/028 - Electrodynamic magnetometers
• G01R 33/32 - Excitation or detection systems, e.g. using radiofrequency signals
• G01N 24/00 - Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
• G01R 33/025 - Compensating stray fields
• G01R 33/00 - Arrangements or instruments for measuring magnetic variables

Abstract

An illustrative wearable brain interface system includes a headgear configured to be worn on a head of a user and a plurality of photodetector units configured to attach to the headgear, the photodetector units each housing a photodetector included in a plurality of photodetectors configured to be controlled by a master control unit to detect photons of light.

IPC Classes  ?

• H01L 31/107 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier working in avalanche mode, e.g. avalanche photodiode
• H04N 5/369 - SSIS architecture; Circuitry associated therewith
• H01L 31/0352 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof characterised by their semiconductor bodies characterised by their shape or by the shapes, relative sizes or disposition of the semiconductor regions
• H01L 31/0224 - Electrodes
• H01L 31/02 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof - Details
• H04N 5/225 - Television cameras
• H04N 5/374 - Addressed sensors, e.g. MOS or CMOS sensors

Abstract

An array of optically pumped magnetometers includes an array of vapor cells; and an array of beam splitters. The array of beam splitters is arranged into columns, including a first column, and rows. Each row and each column includes at least two of the beam splitters. The array of beam splitters is configured to receive light into the first column of the array and to distribute that light from the first column into each of the rows and to distribute the light from each of the rows into a plurality of individual light beams directed toward the vapor cells.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping

Abstract

Brain activity of a user is detected, and a mental state of the user is determined. In one technique, life/work context is automatically presented to the user in a manner that modulates the mental state of the user. In another technique, an entertainment selection is presented to the user, and an entertainment selection list is automatically modified in response to the determined mental state of the user. In still another technique, the mental state that is determined is a negative emotional state, and life/work context is automatically presented to the user in a manner that promotes a cognitive state of the user in response to the determined emotional state of the user. In yet another technique, the wellness of the user is automatically tracked over a time period based on the determined mental state.

IPC Classes  ?

• A61B 5/16 - Devices for psychotechnics; Testing reaction times
• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• G16B 40/30 - Unsupervised data analysis
• G16B 5/30 - Dynamic-time models
• G11B 27/00 - Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/38 - Acoustic or auditory stimuli
• A61B 5/375 - Electroencephalography [EEG] using biofeedback
• A61B 5/377 - Electroencephalography [EEG] using evoked responses
• A61B 5/378 - Visual stimuli

Abstract

A physiological activity detection system comprises a signal acquisition module configured for non-invasively acquiring a signal from an anatomical structure of a user, the acquired signal having a physiological-encoded component and a periodic artifact component that dominates the physiological-encoded component. The physiological activity detection system further comprises a phase-locked loop (PLL) component configured for estimating a phase of the periodic artifact component of the acquired signal, and generating a periodic reference signal having a phase representative of the estimated phase of the periodic artifact component of the acquired signal.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/024 - Measuring pulse rate or heart rate

Abstract

A method of making an array of vapor cells for an array of magnetometers includes providing a plurality of separate vapor cell elements, each vapor cell element including at least one vapor cell; arranging the vapor cell elements in an alignment jig to produce a selected arrangement of the vapor cells; attaching at least one alignment-maintaining film onto the vapor cell elements in the alignment jig; transferring the vapor cells elements and the at least one alignment-maintaining film from the alignment jig to a mold; injecting a bonding material into the mold and between the vapor cell elements to bond the vapor cell elements in the selected arrangement; removing the at least one alignment maintaining film from the vapor cell elements; and removing the bonded vapor cells elements in the selected arrangement from the mold to provide the array of vapor.

IPC Classes  ?

• G01R 3/00 - Apparatus or processes specially adapted for the manufacture of measuring instruments
• C09J 163/00 - Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• B29C 65/78 - Means for handling the parts to be joined, e.g. for making containers or hollow articles
• B29C 65/54 - Applying the adhesive between pre-assembled parts
• G01R 33/00 - Arrangements or instruments for measuring magnetic variables

Abstract

An illustrative wearable system includes a head-mountable component configured to be worn on a head of a user and a processor. The head-mountable component includes a time-to-digital converter (TDC) configured to receive, during a predetermined event detection time window that commences in response to an application of a light pulse to a target, a signal triggered by an event in which a photodetector detects a photon of the light pulse after the light pulse reflects from the target, the signal configured to enable a GRO of the TDC. The TDC is further configured to measure, using the GRO, a time interval between when the event occurred and an end of the predetermined event detection time window. The processor is configured to determine, based on the time interval and the predetermined event detection time window, an arrival time of the photon at the photodetector.

IPC Classes  ?

• H01L 31/107 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier working in avalanche mode, e.g. avalanche photodiode
• H01L 31/02 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof - Details

Abstract

A magnetic field measurement system that includes at least one magnetometer; at least one magnetic field generator; a processor coupled to the at least one magnetometer and the at least one magnetic field generator and configured to: measure an ambient background magnetic field using at least one of the at least one magnetometer in a first mode selected from a scalar mode or a vector mode; generate, in response to the measurement of the ambient background magnetic field, a compensation field using the at least one magnetic field generator; and measure a target magnetic field using at least one of the at least one magnetometer in a spin exchange relaxation free (SERF) mode which is different from the first mode.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping

Abstract

A method of operating an optically pumped magnetometer (OPM) includes directing a light beam through a vapor cell of the OPM including a vapor of atoms; applying RF excitation to cause spins of the atoms to precess; measuring a frequency of the precession; for each of a plurality of different axes relative to the vapor cell, directing a light beam through the vapor cell, applying a magnetic field through the vapor cell along the axis, applying RF excitation to cause spins of the atoms to precess, and measuring a frequency of the precession in the applied magnetic field; determining magnitude and components of an ambient background magnetic field along the axes using the measured frequencies; and applying a magnetic field based on the components around the vapor cell to counteract the ambient background magnetic field to facilitate operation of the OPM in a spin exchange relaxation free (SERF) mode.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons

Abstract

An array of optically pumped magnetometers includes an array of vapor cells; and an array of beam splitters. The array of beam splitters is arranged into columns, including a first column, and rows. Each row and each column includes at least two of the beam splitters. The array of beam splitters is configured to receive light into the first column of the array and to distribute that light from the first column into each of the rows and to distribute the light from each of the rows into a plurality of individual light beams directed toward the vapor cells.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping

Abstract

A calibration arrangement of a magnetic field measurement device includes at least one attachment point nub configured for attachment to the magnetic field measurement device; mounting arms extending from the at least one attachment point nub; and reference coil loops distributed among the mounting arms. A magnetic field measurement system includes the calibration arrangement and a magnetic field measurement device including a sensor mounting body, magnetic field sensors disposed on or within the sensor mounting body, and at least one primary attachment point formed in or on the sensor mounting body configured to receive the at least one attachment point nub of the calibration arrangement.

IPC Classes  ?

• G01R 33/00 - Arrangements or instruments for measuring magnetic variables
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals

Abstract

An optically pumped magnetometer device includes a first vapor cell having a light input window; a first light source configured to produce a first light beam; a first prism optic configured to receive the first light beam from the first light source and redirect the first light beam into the first vapor cell at a non-normal direction relative to the light input window of the first vapor cell; and a first light detector configured to receive the first light beam after passing through the first vapor cell. The device may also include additional light sources and light detectors which may share the prism optic and vapor cell (or utilize another prism optic or vapor cell or both).

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping

Abstract

A non-invasive system and method are provided. Brain activity of a user is detected using a non-invasive brain interface when the user is exposed to an external stimulus. The user is determined to be negatively primed by the external stimulus based on the detected brain activity. An alert that the user is being negatively primed by the external stimulus is automatically provided. A tagged training session may be automatically provided to the user in response determining that the user has a negative mental state, thereby promoting a positive mental state of the user. A training session list containing the tagged training session may be automatically modified based on the determined mental state of the user.

IPC Classes  ?

• A61B 5/375 - Electroencephalography [EEG] using biofeedback
• A61M 21/02 - Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis for inducing sleep or relaxation, e.g. by direct nerve stimulation, hypnosis, analgesia
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• A61B 5/16 - Devices for psychotechnics; Testing reaction times

Abstract

An exemplary photodetector system includes a photodetector and a time-to-digital converter (TDC) coupled to the photodetector. The TDC is configured to receive, during a predetermined event detection time window that commences in response to an application of a light pulse to a target, a signal triggered by an event in which the photodetector detects a photon of the light pulse after the light pulse reflects from the target. The TDC is further configured to enable, in response to the receiving the signal, a gated ring oscillator (GRO) of the TDC, measure, using the GRO, a time interval between when the event occurred and an end of the predetermined event detection time window, and determine, based on the time interval and the predetermined event detection time window, an arrival time of the photon at the photodetector.

IPC Classes  ?

• G04F 10/00 - Apparatus for measuring unknown time intervals by electric means
• H01L 31/107 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier working in avalanche mode, e.g. avalanche photodiode
• H01L 31/02 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof - Details

Abstract

A neural phantom device configured and arranged to produce a magnetic field to simulate a neural signal. The neural phantom device includes a driver having a signal source configured to produce a simulated neural signal, and either i) a carrier wave source configured to produce a carrier wave having a frequency of at least 250 Hz or ii) an optical carrier wave source configured to produce an optical carrier wave, wherein the driver is configured to modulate the simulated neural signal using the carrier wave or optical carrier wave to generate a modulated signal. The neural phantom device also includes a phantom configured to receive the modulated signal, demodulate the modulated signal to recover the simulated neural signal, and generate the magnetic field in response to the simulated neural signal.

IPC Classes  ?

• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• G09B 23/30 - Anatomical models
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• A61B 8/00 - Diagnosis using ultrasonic, sonic or infrasonic waves

Abstract

An exemplary system includes an array of photodetectors and a control system. Each photodetector of the array of photodetectors may include a single-photon avalanche diode (SPAD) and a fast-gating circuit configured to arm and disarm the SPAD. The control system is configured to control a current drawn by the array of photodetectors.

IPC Classes  ?

• H01L 31/107 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier working in avalanche mode, e.g. avalanche photodiode
• H01L 27/144 - Devices controlled by radiation
• H01L 31/02 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details thereof - Details

Abstract

An exemplary photodetector system includes a plurality of photodetectors connected in parallel and a processor communicatively coupled to the plurality of photodetectors. The processor is configured to receive an accumulated output from the plurality of photodetectors. The accumulated output represents an accumulation of respective outputs from each of the plurality of photodetectors detecting photons during a predetermined measurement time period that occurs in response to a light pulse being directed toward a target within a body. The processor is further configured to determine, based on the accumulated output, a temporal distribution of photons detected by the plurality of photodetectors, and generate, based on the temporal distribution of photons, a histogram representing a light pulse response of the target within the body.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01J 1/44 - Electric circuits
• G04F 10/00 - Apparatus for measuring unknown time intervals by electric means

Abstract

An exemplary magnetic field measurement system includes a wearable sensor unit and a controller. The wearable sensor unit includes 1) a magnetometer comprising a photodetector and 2) a magnetic field generator configured to generate a compensation magnetic field configured to actively shield the magnetometer from ambient background magnetic fields. The controller is configured to interface with the magnetometer and the magnetic field generator and includes a differential signal measurement circuit configured to measure current output by the photodetector.

IPC Classes  ?

• G01R 33/00 - Arrangements or instruments for measuring magnetic variables
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
• A61B 5/05 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• G01R 33/09 - Magneto-resistive devices
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• H01F 7/20 - Electromagnets; Actuators including electromagnets without armatures
• H01F 27/28 - Coils; Windings; Conductive connections
• H01F 27/36 - Electric or magnetic shields or screens
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components

Abstract

An exemplary wearable sensor unit includes 1) a magnetometer comprising a vapor cell comprising an input window and containing an alkali metal, and a light source configured to output light that passes through the input window and into the vapor cell along a transit path, and 2) a temperature control circuit external to the vapor cell and configured to create a temperature gradient within the vapor cell, the temperature gradient configured to concentrate the alkali metal within the vapor cell away from the transit path of the light.

IPC Classes  ?

• G01R 33/00 - Arrangements or instruments for measuring magnetic variables
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
• A61B 5/05 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01R 33/09 - Magneto-resistive devices
• H01F 7/20 - Electromagnets; Actuators including electromagnets without armatures
• H01F 27/28 - Coils; Windings; Conductive connections
• H01F 27/36 - Electric or magnetic shields or screens
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• G01R 33/025 - Compensating stray fields

Abstract

A magnetic field generator includes a plurality of conductive windings comprising a first conductive winding arranged in a first plane and a second conductive winding arranged in a second plane that is substantially parallel to the first plane. The plurality of conductive windings are configured to generate, when supplied with a drive current, a first component of a compensation magnetic field. The first component of the compensation magnetic field is configured to actively shield a magnetic field sensing region located between the first conductive winding and the second conductive winding from ambient background magnetic fields along a first axis that is substantially orthogonal to the first plane and the second plane.

IPC Classes  ?

• H01F 7/20 - Electromagnets; Actuators including electromagnets without armatures
• H01F 27/28 - Coils; Windings; Conductive connections
• H01F 27/36 - Electric or magnetic shields or screens
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• G01R 33/00 - Arrangements or instruments for measuring magnetic variables

Abstract

A magnetic field measurement system includes a wearable device having a plurality of wearable sensor units. Each wearable sensor unit includes a plurality of magnetometers and a magnetic field generator configured to generate a compensation magnetic field configured to actively shield the plurality magnetometers from ambient background magnetic fields. A strength of a fringe magnetic field generated by the magnetic field generator of each of the wearable sensor units is less than a predetermined value at the plurality of magnetometers of each wearable sensor unit included in the plurality of wearable sensor units.

IPC Classes  ?

• G01R 33/00 - Arrangements or instruments for measuring magnetic variables
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
• A61B 5/05 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
• A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• G01R 33/09 - Magneto-resistive devices
• H01F 7/20 - Electromagnets; Actuators including electromagnets without armatures
• H01F 27/28 - Coils; Windings; Conductive connections
• H01F 27/36 - Electric or magnetic shields or screens
• H05K 1/18 - Printed circuits structurally associated with non-printed electric components
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals