公开(公告)号：US11740075B2

公开(公告)日：2023-08-29

申请号：US17504004

申请日：2021-10-18

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Michael Hall ,  Xinqiao Liu ,  Zhaoming Zhu ,  Rajesh Lachhmandas Chhabria ,  Huixuan Tang ,  Shuochen Su ,  Zihe Gao

IPC: G06T7/521 ,  G01B11/22 ,  G01B11/25 ,  G06T7/529 ,  G02B27/01 ,  G06T7/11 ,  G06T7/174 ,  G06T7/55 ,  G06T7/00 ,  G06T7/90 ,  H04N13/106 ,  H04N13/204 ,  G06T7/593 ,  H04N13/128 ,  H04N13/271 ,  H04N13/239 ,  H04N23/56 ,  G06V10/22 ,  G06V10/145 ,  H04N13/00

CPC classification number: G01B11/2513 ,  G01B11/22 ,  G02B27/0172 ,  G06T7/11 ,  G06T7/174 ,  G06T7/521 ,  G06T7/529 ,  G06T7/55 ,  G06T7/593 ,  G06T7/90 ,  G06T7/97 ,  G06V10/145 ,  G06V10/22 ,  H04N13/106 ,  H04N13/128 ,  H04N13/204 ,  H04N13/239 ,  H04N13/271 ,  H04N23/56 ,  G02B2027/014 ,  G02B2027/0138 ,  G02B2027/0178 ,  G06T2207/10028 ,  H04N2013/0081

Abstract: A depth camera assembly (DCA) determines depth information. The DCA projects a dynamic structured light pattern into a local area and captures images including a portion of the dynamic structured light pattern. The DCA determines regions of interest in which it may be beneficial to increase or decrease an amount of texture added to the region of interest using the dynamic structured light pattern. For example, the DCA may identify the regions of interest based on contrast values calculated using a contrast algorithm, or based on the parameters received from a mapping server including a virtual model of the local area. The DCA may selectively increase or decrease an amount of texture added by the dynamic structured light pattern in portions of the local area. By selectively controlling portions of the dynamic structured light pattern, the DCA may decrease power consumption and/or increase the accuracy of depth sensing measurements.

公开(公告)号：US11949213B2

公开(公告)日：2024-04-02

申请号：US17069731

申请日：2020-10-13

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Nadav Grossinger ,  Michael Hall ,  Robert Hasbun ,  Jonatan Ginzburg ,  Zihe Gao

IPC: H01S5/42 ,  G01S17/89 ,  G02B27/01 ,  G06T7/521 ,  H04N13/271

CPC classification number: H01S5/423 ,  G01S17/89 ,  G02B27/0172 ,  G06T7/521 ,  H04N13/271

Abstract: A depth camera assembly (DCA) determines depth information for a local area. The DCA includes a camera assembly and at least one illuminator. The DCA may select a subset of the VCSELs to provide illumination at any given time. The illuminator may comprise near-field VCSELs configured to generate a structured light (SL) pattern for depth sensing in the near-field and far-field VCSELs configured to generate a SL pattern for depth sensing in the far-field. The near-field VCSELs may comprise a linear emission region which is shorter than a linear emission region of the far-field VCSELs. The DCA may generate and phase shift a quasi-sinusoidal SL pattern. The DCA may phase shift the quasi-sinusoidal SL pattern by alternating which traces on the illuminator are active.

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：US11435528B1

公开(公告)日：2022-09-06

申请号：US16924676

申请日：2020-07-09

Applicant: Meta Platforms Technologies, LLC

Inventor： Zihe Gao ,  Zhaoming Zhu ,  Michael Hall ,  Guohua Wei

IPC: G02B6/34 ,  G01B11/22 ,  G02B27/01 ,  G02B27/09 ,  G02B6/42

Abstract: A photonic integrated circuit assembly generates light for use in a display system or a depth sensing system. The photonic integrated circuit assembly includes optical conditioning elements integrated into a photonic integrated circuit. The photonic integrated circuit includes one or more light sources on the photonic integrated circuit. The photonic integrated circuit includes a waveguide and one or more gratings located in a core of the photonic integrated circuit. The gratings may collimate and/or collocate light emitted by the light source. The photonic integrated circuit may include a beam shaping element integrated into the photonic integrated circuit. A MEMS scanner may use the collocated and/or collimated light emitted by the photonic integrated circuit to generate a display for a user or to generate a structured light pattern for use in a depth sensing system.