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    Device Enumeration in an Optical Measurement System
    2.
    发明申请
    Device Enumeration in an Optical Measurement System 有权

    公开(公告)号：US20210290065A1

    公开(公告)日：2021-09-23

    申请号：US17202548

    申请日：2021-03-16

    申请人： HI LLC

    发明人： Benjamin Siepser ,  Sangyong Park ,  Sebastian Sorgenfrei ,  Jacob Dahle ,  Ryan Field ,  Alex Borisevich ,  Milin J. Patel

    IPC分类号： A61B5/00 ,  G01J1/42 ,  G01J1/44

    摘要： 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.

    Bias Voltage Generation in an Optical Measurement System
    4.
    发明申请
    Bias Voltage Generation in an Optical Measurement System 有权

    公开(公告)号：US20210294129A1

    公开(公告)日：2021-09-23

    申请号：US17202613

    申请日：2021-03-16

    申请人： HI LLC

    发明人： Ryan Field ,  Jacob Dahle ,  Rong Jin ,  Alex Borisevich ,  Sebastian Sorgenfrei ,  Bruno Do Valle

    IPC分类号： G02F1/01 ,  A61B5/00 ,  H04B10/50 ,  G01J1/42 ,  G01J1/44

    摘要： 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.

    Control Circuit for a Light Source in an Optical Measurement System
    5.
    发明申请
    Control Circuit for a Light Source in an Optical Measurement System 有权

    公开(公告)号：US20210290067A1

    公开(公告)日：2021-09-23

    申请号：US17202554

    申请日：2021-03-16

    申请人： HI LLC

    发明人： Alex Borisevich ,  Ryan Field

    IPC分类号： A61B5/00 ,  H01S5/062 ,  G01J1/44

    摘要： 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.

    Maintaining Consistent Photodetector Sensitivity in an Optical Measurement System
    7.
    发明申请
    Maintaining Consistent Photodetector Sensitivity in an Optical Measurement System 有权

    公开(公告)号：US20220397453A1

    公开(公告)日：2022-12-15

    申请号：US17724628

    申请日：2022-04-20

    申请人： HI LLC

    发明人： Alex Borisevich

    IPC分类号： G01J1/08 ,  H01L31/107 ,  G06F1/16

    摘要： 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.

    Data Aggregation and Power Distribution in Time Domain-Based Optical Measurement Systems
    8.
    发明申请
    Data Aggregation and Power Distribution in Time Domain-Based Optical Measurement Systems 有权

    公开(公告)号：US20220280110A1

    公开(公告)日：2022-09-08

    申请号：US17680828

    申请日：2022-02-25

    申请人： HI LLC

    发明人： Ryan Field ,  Jacob Dahle ,  Alex Borisevich ,  Wingyuen Poon ,  Milin J. Patel

    IPC分类号： A61B5/00

    摘要： 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.

    Systems and Methods for Calibration of an Optical Measurement System
    9.
    发明申请
    Systems and Methods for Calibration of an Optical Measurement System 有权

    公开(公告)号：US20220273212A1

    公开(公告)日：2022-09-01

    申请号：US17668722

    申请日：2022-02-10

    申请人： HI LLC

    发明人： Alex Borisevich ,  Ryan Field ,  Han Yong Ban

    IPC分类号： A61B5/16 ,  A61B5/375 ,  A61B5/00

    摘要： 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.