公开(公告)号：US20240268715A1

公开(公告)日：2024-08-15

申请号：US18413578

申请日：2024-01-16

Applicant: Meta Platforms Technologies, LLC

Inventor： Mantas ZURAUSKAS ,  Jiamin Zheng

IPC: A61B5/145 ,  A61B5/00 ,  A61B5/1455 ,  G02B27/00 ,  G02B27/01

CPC classification number: A61B5/14532 ,  A61B5/14558 ,  A61B5/6803 ,  G02B27/0093 ,  G02B27/0172 ,  A61B2560/0406 ,  A61B2562/0233

Abstract: According to examples, an apparatus may include a processor and a memory on which is stored machine-readable instructions that when executed by the processor, cause the processor to access a detected polarization state of light reflected from an individual's eye, identify conditions associated with a detection of the polarization state of the light reflected from the individual's eye, determine whether the identified conditions match certain conditions within predefined difference levels, and determine a variance in the detected polarization state of the light from a previously detected polarization state based on a determination that the identified conditions match the certain conditions within the predefined difference levels, in which a change in a glucose level of the individual is to be determined based on the determined variance.

公开(公告)号：US20250090014A1

公开(公告)日：2025-03-20

申请号：US18468069

申请日：2023-09-15

Applicant: Meta Platforms Technologies, LLC

Inventor： Leo BALDWIN ,  Mantas ZURAUSKAS

IPC: A61B3/10 ,  G02B27/01 ,  G06F3/01 ,  G06T19/00

Abstract: Apparatuses, methods, and systems for an ocular hydration sensor/reflectometer system in a near-eye display device are described. In one aspect, a near-eye display device may include a projector to project light onto a user's eye, a photodetector to receive reflections from the tear film of the user's eye (e.g., the tear glints), and a controller to make ocular hydration measurements from the received reflections. The ocular hydration measurements may be used to (1) re-calibrate an eye tracking system of the near-eye display device (by changing parameters such as, e.g., light intensity and/or exposure time); (2) prompt the user to take remedial action; and/or (3) keep track of the user's eye health over time. The projector, photodetector, and/or controller may be integrated into, separate from, or partially integrated/partially separate from the eye tracking system. Collective die-on-wafer processing, embedded motheye lens structures, and adaptive thermal management using thermoelectric coolers are also described.

公开(公告)号：US20240175676A1

公开(公告)日：2024-05-30

申请号：US18071298

申请日：2022-11-29

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han LEE ,  Scott Charles MCELDOWNEY ,  Lu LU ,  Mantas ZURAUSKAS ,  Qing CHAO

IPC: G01B11/22 ,  G02F1/01

CPC classification number: G01B11/22 ,  G02F1/0136 ,  G02B27/283

Abstract: According to examples, a depth sensing apparatus may include an illumination source to output a light beam onto a polarizing beam separation element (PBSE). The PBSE may generate a right hand circularly polarized (RCP) beam and a left hand circularly polarized (LCP) beam to be projected onto a target area, in which the RCP beam and the LCP beam may create an interference with respect to each other. The depth sensing apparatus also includes an imaging component to capture an image of the target area with the RCP beam and the LCP beam projected on the target area, in which the captured image is to be analyzed for depth sensing of the target area. The depth sensing apparatus further includes a polarizer that may increase an intensity of the interference pattern.

公开(公告)号：US20240369352A1

公开(公告)日：2024-11-07

申请号：US18384660

申请日：2023-10-27

Applicant: Meta Platforms Technologies, LLC

Inventor： Salim BOUTAMI ,  Mantas ZURAUSKAS ,  Scott Charles MCELDOWNEY

IPC: G01B11/25 ,  G01B11/22 ,  H04N13/254

Abstract: According to examples, a system for implementing structured polarized illumination techniques to determine and reconstruct a shape and a material property of an object is described. The system may include a light source to transmit an original beam of light; a first grating to diffract the original beam of light into a first light beam and a second light beam, a second grating to emit overlapping light beams towards an object, a polarization camera to capture light reflected from the object, and a computer system, comprising a processor and a non-transitory computer-readable storage medium having an executable stored thereon. The processor, when executing the instructions, may cause the system to analyze the light reflected from the object to determine a fringe projection analysis associated with the object, determine a shape of the object; and determine a Mueller matrix to describe material properties of the object.

公开(公告)号：US20240355148A1

公开(公告)日：2024-10-24

申请号：US18622183

申请日：2024-03-29

Applicant: Meta Platforms Technologies, LLC

Inventor： Mantas ZURAUSKAS ,  James SCHLOSS ,  Pavel TROCHTCHANOVITCH

IPC: G06V40/40 ,  G02B27/42 ,  G06F3/01 ,  G06T19/00 ,  G06V10/143 ,  G06V40/10

CPC classification number: G06V40/40 ,  G02B27/4205 ,  G06F3/013 ,  G06T19/006 ,  G06V10/143 ,  G06V40/15

Abstract: Methods, systems, and apparatuses for eye tracking in a near-eye display device are described. In one aspect, an eye tracking system has an array of Vertical Cavity Surface-Emitting Lasers (VCSELs) with different groupings of VCSELs within the array providing structured light with different polarization states such that the structured light projected onto the user's eye has (i) a spatially varying and/or temporally-varying intensity profile and/or (ii) a spatially varying and/or temporally-varying polarization profile. In another aspect, an eye tracking system includes a light source, an image sensor, and a controller which controls the image sensor to capture series of images of light reflections from the eye when the eye is stationary, determines blood flow characteristics using pattern changes in the captured series of images, and performs user authentication and/or liveness detection based on the detected blood flow characteristics.

公开(公告)号：US20240344823A1

公开(公告)日：2024-10-17

申请号：US18134362

申请日：2023-04-13

Applicant: Meta Platforms Technologies, LLC

Inventor： Mantas ZURAUSKAS

IPC: G01B11/25 ,  H04N23/10

CPC classification number: G01B11/2513 ,  H04N23/10

Abstract: A system for dynamic profilometric imaging using multiscale pattern(s) is described. The system may include a projector that projects a multiscale pattern on an environment including a target of interest. The system may also include an imaging sensor that receives reflections of the projected multiscale pattern from the target of interest. The system may further include a controller of the camera and the projector which performs profilometric imaging of the target of interest by dynamically adjusting an operational parameter of the camera, the projector, and/or the controller. The multiscale pattern(s) may contain useful features at multiple scales and/or may be optimal at predetermined depths and/or resolutions. By dynamically adjusting the operational parameter, such a profilometric imaging system may perform there-dimensional (3D) scene reconstruction while maintaining optimal performance, power efficiency and profilometric resolution.