公开(公告)号：US20200333129A1

公开(公告)日：2020-10-22

申请号：US16842443

申请日：2020-04-07

Applicant: HI LLC

Inventor： Hooman Mohseni ,  Haowen Ruan ,  Sebastian Sorgenfrei ,  Ryan Field

IPC: G01B9/02

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.

公开(公告)号：US20190355773A1

公开(公告)日：2019-11-21

申请号：US16283730

申请日：2019-02-22

Applicant: HI LLC

Inventor： Ryan Field ,  Husam Katnani ,  Bruno Do Valle ,  Rong Jin ,  Jacob Dahle

IPC: H01L27/146 ,  H01L31/107

Abstract: An exemplary stacked photodetector assembly includes a first wafer and a second wafer bonded to the first wafer. The first wafer includes a SPAD and has a thickness T1 configured to minimize absorption by the first wafer of photons included in light incident upon the first wafer while the SPAD is in a disarmed state. The second wafer has a thickness T2 configured to provide structural support for the first wafer. The stacked photodetector assembly includes a fast gating circuit electrically coupled to the SPAD and configured to arm and disarm the SPAD.

公开(公告)号：US12144653B2

公开(公告)日：2024-11-19

申请号：US17176315

申请日：2021-02-16

Applicant: HI LLC

Inventor： Bruno Do Valle ,  Isai Olvera ,  Ryan Field

IPC: A61B5/00 ,  A61B5/28 ,  A61B5/291 ,  A61B5/297 ,  A61B5/305 ,  A61B5/308 ,  A61B5/31 ,  A61B5/313 ,  A61B5/315 ,  A61B5/318 ,  A61B5/369 ,  A61B5/389 ,  H03F3/45

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.

公开(公告)号：US12059262B2

公开(公告)日：2024-08-13

申请号：US17202657

申请日：2021-03-16

Applicant: HI LLC

Inventor： Ryan Field ,  Bruno Do Valle

IPC: A61B5/00

CPC classification number: A61B5/4064 ,  A61B5/0073 ,  A61B5/0075 ,  A61B5/6803

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.

公开(公告)号：US11969259B2

公开(公告)日：2024-04-30

申请号：US17176487

申请日：2021-02-16

Applicant: HI LLC

Inventor： Scott Jeremy Seidman ,  Jennifer Rines ,  Ryan Field ,  Isai Olvera

IPC: A61B5/00 ,  G01J1/04 ,  G01J1/42 ,  G01J1/44 ,  G06F3/01

CPC classification number: A61B5/6803 ,  A61B5/0059 ,  A61B5/6814 ,  G01J1/0425 ,  G01J1/4228 ,  G01J1/44 ,  G06F3/015 ,  A61B2562/0238 ,  G01J2001/4466

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.

公开(公告)号：US11857348B2

公开(公告)日：2024-01-02

申请号：US17202583

申请日：2021-03-16

Applicant: HI LLC

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

IPC: A61B5/00

CPC classification number: A61B5/7214 ,  A61B5/0082 ,  A61B5/6803 ,  A61B2562/0238 ,  A61B2562/046 ,  A61B2576/026

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.

公开(公告)号：US11789533B2

公开(公告)日：2023-10-17

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

CPC classification number: G06F3/015

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.

公开(公告)号：US20230195228A1

公开(公告)日：2023-06-22

申请号：US18108468

申请日：2023-02-10

Applicant: HI LLC

Inventor： Bryan Johnson ,  Ryan Field ,  Katherine Perdue

IPC: G06F3/01 ,  A63F13/212 ,  A63F13/67

CPC classification number: G06F3/015 ,  A63F13/212 ,  A63F13/67

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.

公开(公告)号：US11656119B2

公开(公告)日：2023-05-23

申请号：US17508325

申请日：2021-10-22

Applicant: HI LLC

Inventor： Ryan Field ,  Husam Katnani ,  Katherine Perdue

IPC: G01J1/02 ,  G01J1/04

CPC classification number: G01J1/0219 ,  G01J1/0238 ,  G01J1/0422

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.

公开(公告)号：US11645483B2

公开(公告)日：2023-05-09

申请号：US17202572

申请日：2021-03-16

Applicant: HI LLC

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

IPC: G06K7/10 ,  G02B27/01

CPC classification number: G06K7/10732 ,  G02B27/0172 ,  G06K7/10851

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.