公开(公告)号：US20250028389A1

公开(公告)日：2025-01-23

申请号：US18909167

申请日：2024-10-08

Applicant: Meta Platforms Technologies, LLC

Inventor： Qing Chao ,  Robert Dale Cavin ,  Guillaume Lestoquoy ,  Mohammadhossein Daraeihajitooei ,  Xinqiao Liu ,  Raffaele Capoccia ,  Sascha Hallstein ,  Ziyun Li

IPC: G06F3/01 ,  G06T7/73 ,  G06V10/25 ,  G06V10/60 ,  G06V40/18 ,  H04N5/33

Abstract: Imaging signals are generated in response to image light. Event signals are generated in response to receive the imaging signals from imaging pixels. A Region of Interest (ROI) of the imaging pixels is identified from a spatial concentration of event signals in the ROI of imaging pixels within a time period. An ROI portion of the imaging pixels in the ROI are driven to capture an ROI image frame.

公开(公告)号：US11516457B2

公开(公告)日：2022-11-29

申请号：US17348469

申请日：2021-06-15

Applicant: Meta Platforms Technologies, LLC

Inventor： Zihe Gao ,  Michael Hall ,  Qing Chao ,  Zhaoming Zhu ,  Tin Komljenovic

IPC: G01B11/25 ,  H04N13/254 ,  G02B27/01 ,  G02F1/225

Abstract: A switchable fringe pattern illuminator includes an optical path switch configured to receive light and dynamically control an amount of light that is provided to a first waveguide and an amount of light that is provided to a second waveguide. A first projector configured to generate a first fringe pattern using light from the first waveguide. The first fringe pattern illuminates a first portion of a target area. A second projector configured to generate a second fringe pattern using light from the second waveguide. The second fringe pattern illuminates a second portion of a target area. The illuminator may be part of a depth camera assembly (DCA). The DCA is configured to capture images of a portion of the target area. The DCA is further configured to determine depth information for an object in the target area based in part on the captured images.

公开(公告)号：US20240223919A1

公开(公告)日：2024-07-04

申请号：US18531154

申请日：2023-12-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Song Chen ,  Xinqiao Liu ,  Tsung-Hsun Tsai ,  Qing Chao ,  Michael Hall ,  David Maurice Moore ,  Sharvil Shailesh Talati

IPC: H04N25/616 ,  H04N25/131 ,  H04N25/53 ,  H04N25/67 ,  H04N25/771

CPC classification number: H04N25/616 ,  H04N25/131 ,  H04N25/53 ,  H04N25/67 ,  H04N25/771

Abstract: Systems and methods of the present disclosure include a digital image sensor pixel configured to perform digital correlated double-sampling (D-CDS) operations to compensate for fixed pattern noise (FPN) induced by comparator propagation delay variation across a digital pixel array. The pixel and D-CDS operations also support quantization of incident light using two pixel memory banks. The pixel includes data retention logic coupled to selectively lock and unlock the output of a comparator. The output of the comparator is combined with memory bank write enable signals to convert photodiode charge into digital pixel values stored in the two memory banks. The digital pixel values stored in the memory banks may be added or subtracted to generate an FPN compensated digital pixel value.

公开(公告)号：US20240093984A1

公开(公告)日：2024-03-21

申请号：US18088302

申请日：2022-12-23

Applicant: Meta Platforms Technologies, LLC

Inventor： Guohua Wei ,  Petr Markov ,  Qing Chao

IPC: G01B11/25 ,  G02B6/12 ,  G02B27/00 ,  G02B27/01 ,  G06V40/18 ,  H01S5/183 ,  H01S5/40

CPC classification number: G01B11/2513 ,  G02B6/12004 ,  G02B27/0093 ,  G02B27/017 ,  G06V40/18 ,  H01S5/18305 ,  H01S5/4031 ,  G02B2006/12038 ,  G02B2006/1204 ,  G02B2006/12061 ,  G02B2027/0178 ,  G06V2201/12

Abstract: An optical system is configured to support eye tracking operations in a head mounted device. The optical system includes a transparent layer, a laser, and first and second output couplers. The laser is configured to emit light into the transparent layer. The first output coupler is configured to out-couple a first portion of the light from a first location of the transparent layer. The second output coupler is configured to out-couple a second portion of the light from a second location of the transparent layer. The first and second output couplers are in the field-of-view of a user. A combination of the first portion of the light and the second portion of the light out-coupled from the first output coupler and the second output coupler is configured to generate a fringe pattern, for example, on an eye of a user of the head mounted device.

公开(公告)号：US20230008674A1

公开(公告)日：2023-01-12

申请号：US17850898

申请日：2022-06-27

Applicant: Meta Platforms Technologies, LLC

Inventor： Qing Chao ,  Hao Yu ,  Lu Lu ,  Scott Charles McEldowney ,  Xinqiao Liu ,  Eric Fest

IPC: G02B5/30 ,  G02B3/00 ,  H04N5/369 ,  H04N5/33

Abstract: An image sensor includes imaging pixels and a patterned liquid crystal polarizer (LCP). The imaging pixel include subpixels. The patterned LCP is disposed over the subpixels and configured to direct a particular polarized portion of imaging light to particular subpixels.

公开(公告)号：US20240340404A1

公开(公告)日：2024-10-10

申请号：US18130593

申请日：2023-04-04

Applicant: Meta Platforms Technologies, LLC

Inventor： Song CHEN ,  Qing Chao ,  Yi Zheng

IPC: H04N13/383 ,  G02B27/01 ,  G06F1/16 ,  H04N13/128 ,  H04N13/207 ,  H04N13/344

CPC classification number: H04N13/383 ,  G02B27/0172 ,  G02B27/0179 ,  G06F1/163 ,  H04N13/128 ,  H04N13/207 ,  H04N13/344 ,  G02B2027/0178 ,  G02B2027/0187 ,  H04N2013/0081

Abstract: A system for three-dimensional object sensing using fringe-projection profilometry with Fourier transform analysis is described. A fringe-projection profilometry (FPP) projector simultaneously transmits a frequency signal pattern (i.e., modulated or AC signal) and a zero-frequency signal pattern (i.e., unmodulated or DC signal) onto an object's surface. Alternatively, the projector projects two frequency signal patterns phase-shifted by 180 degrees. A dual readout sensor captures reflections of both signals from the object's surface as adjacent frames, and the DC signal is extracted by subtraction of addition to obtain an enhanced signal. The enhanced signal is used to generate a wrapped phase map through Fourier transform profilometry (FTP). The resulting wrapped phase map is unwrapped, and three-dimensional reconstruction of the object's surface is generated by converting phase from the unwrapped phase map to three-dimensional coordinates.

公开(公告)号：US11756978B2

公开(公告)日：2023-09-12

申请号：US17184244

申请日：2021-02-24

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Qing Chao ,  Xinqiao Liu

IPC: H01L27/146

CPC classification number: H01L27/14652 ,  H01L27/1462 ,  H01L27/14605

Abstract: In some examples, an apparatus comprises: a first photodiode to sense a first component of light associated with a first wavelength, and a second photodiode configured to sense a second component of the light associated with a second wavelength, the first component and the second component being associated with, respectively, a first wavelength and a second wavelength. The apparatus further comprises a first optical structure and a second optical structure positioned over, respectively, the first photodiode and the second photodiode. The first optical structure is configured to increase a propagation path of the first component of the light within the first photodiode and has a first optical property based on the first wavelength. The second optical structure is configured to increase a propagation path of the second component of the light within the second photodiode, and has a second optical property based on the second wavelength.

公开(公告)号：US20220413284A1

公开(公告)日：2022-12-29

申请号：US16261531

申请日：2019-01-29

Applicant: Meta Platforms Technologies, LLC

Inventor： Qing Chao ,  Zhaoming Zhu

IPC: G02B27/00 ,  G06F3/01 ,  H04N5/225 ,  H04N5/235 ,  G01B11/25 ,  G01B11/22

Abstract: A depth camera assembly (DCA) has a light source assembly, a mask, a camera assembly, and a controller. The light source assembly includes at least one light source. The mask is configured to generate an interference pattern that is projected into a target area. The mask has two openings configured to pass through light emitted by the at least one light source, and the light passed through the two openings forms an interference pattern across the target area. The interference pattern has a phase based on a position of the light source. The camera assembly is configured to capture images of a portion of the target area that includes the interference pattern. The controller is configured to determine depth information for the portion of the target area based on the captured images.

公开(公告)号：US11417005B1

公开(公告)日：2022-08-16

申请号：US17203049

申请日：2021-03-16

Applicant: Meta Platforms Technologies, LLC

Inventor： Qing Chao ,  Michael Hall

IPC: G06T7/00 ,  G06F1/00 ,  G06T7/521 ,  G02B26/08 ,  G02B5/18 ,  H04N5/225 ,  G06F1/16 ,  G02B26/10 ,  G02B5/30

Abstract: A depth camera assembly (DCA) for depth sensing of a local area. The DCA includes a polarized light generator, an imaging device, and a controller. The polarized light generator modulates one or more optical beams emitted from an illumination source to generate modulated light, and projects the modulated light into the local area as polarized light having a first polarization. The imaging device receives light from the local area, the received light including ambient light and a portion of the polarized light reflected from the local area. The imaging device reduces an intensity of the received light having polarization different from a second polarization to generate filtered light substantially composed of light of the second polarization, and detects the portion of the polarized light having the second polarization using the filtered light. The controller determines depth information for the local area based on the detected portion of the polarized light.

公开(公告)号：US12231749B2

公开(公告)日：2025-02-18

申请号：US17865223

申请日：2022-07-14

Applicant: Meta Platforms Technologies, LLC

Inventor： Qing Chao ,  Lu Lu ,  Xinqiao Liu ,  Hao Yu ,  Junren Wang

IPC: H04N23/11 ,  G02B1/00 ,  G02B3/00 ,  G02B5/20 ,  G02B5/30 ,  G02B5/32 ,  H04N23/00

Abstract: Imaging systems, cameras, and image sensors of this disclosure include imaging pixels that include subpixels. Diffractive optical elements such as a metasurface lens layers or a liquid crystal polarization hologram (LCPH) are configured to focus image light to the subpixels of the imaging pixels.