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    Devices, Systems, and Methods for Calibrating an Optical Measurement Device
    71.
    发明申请
    Devices, Systems, and Methods for Calibrating an Optical Measurement Device 有权

    公开(公告)号：US20220265174A1

    公开(公告)日：2022-08-25

    申请号：US17665821

    申请日：2022-02-07

    Applicant: HI LLC

    Inventor： Michael Henninger ,  Ryan Field ,  Han Yong Ban

    IPC: A61B5/1495 ,  A61B5/1455

    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.

    Phase Lock Loop Circuit Based Signal Generation in an Optical Measurement System
    73.
    发明申请
    Phase Lock Loop Circuit Based Signal Generation in an Optical Measurement System 有权

    公开(公告)号：US20220116048A1

    公开(公告)日：2022-04-14

    申请号：US17559774

    申请日：2021-12-22

    Applicant: HI LLC

    Inventor： Jacob Dahle ,  Bruno Do Valle ,  Rong Jin ,  Ryan Field ,  Sebastian Sorgenfrei

    IPC: H03L7/099 ,  G02B27/01 ,  H03L7/089 ,  H03L7/197 ,  H03L7/08

    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.

    Synchronization Between Brain Interface System and Extended Reality System
    74.
    发明申请
    Synchronization Between Brain Interface System and Extended Reality System 有权

    公开(公告)号：US20220091672A1

    公开(公告)日：2022-03-24

    申请号：US17466683

    申请日：2021-09-03

    Applicant: HI LLC

    Inventor： Ryan Field ,  Bryan Johnson ,  Gabriel Lerner ,  Antonio H. Lara

    IPC: G06F3/01

    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.

    Phase Lock Loop Circuit Based Signal Generation in an Optical Measurement System
    76.
    发明申请
    Phase Lock Loop Circuit Based Signal Generation in an Optical Measurement System 有权

    公开(公告)号：US20210297084A1

    公开(公告)日：2021-09-23

    申请号：US17202524

    申请日：2021-03-16

    Applicant: HI LLC

    Inventor： Jacob Dahle ,  Bruno Do Valle ,  Rong Jin ,  Ryan Field ,  Sebastian Sorgenfrei

    IPC: H03L7/099 ,  H03L7/197 ,  H03L7/089 ,  G02B27/01

    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.

    High Density Optical Measurement Systems with Minimal Number of Light Sources
    77.
    发明申请
    High Density Optical Measurement Systems with Minimal Number of Light Sources 有权

    公开(公告)号：US20210293614A1

    公开(公告)日：2021-09-23

    申请号：US17202641

    申请日：2021-03-16

    Applicant: HI LLC

    Inventor： Ryan Field ,  Husam Katnani ,  Katherine Perdue

    IPC: G01J1/02 ,  G01J1/04

    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.

    Photodetector Calibration of an Optical Measurement System
    79.
    发明申请
    Photodetector Calibration of an Optical Measurement System 有权

    公开(公告)号：US20210290069A1

    公开(公告)日：2021-09-23

    申请号：US17202668

    申请日：2021-03-16

    Applicant: HI LLC

    Inventor： Sebastian Sorgenfrei ,  Ryan Field ,  Bruno Do Valle ,  Isai Olvera ,  Jacob Dahle ,  Husam Katnani

    IPC: A61B5/00

    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.

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