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    INTERFEROMETRIC STRUCTURED ILLUMINATION FOR DEPTH DETERMINATION
    2.
    发明申请
    INTERFEROMETRIC STRUCTURED ILLUMINATION FOR DEPTH DETERMINATION 有权

    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.

    Depth camera assembly based on near infra-red illuminator
    4.
    发明授权
    Depth camera assembly based on near infra-red illuminator 有权

    公开(公告)号：US11733524B1

    公开(公告)日：2023-08-22

    申请号：US17329799

    申请日：2021-05-25

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Zhaoming Zhu ,  Nicholas Daniel Trail

    IPC: G02B27/01 ,  G06T7/70 ,  G01S17/10

    CPC classification number: G02B27/0172 ,  G01S17/10 ,  G06T7/70 ,  G02B2027/0178

    Abstract: A depth camera assembly for depth sensing of a local area includes an illumination source, an imaging device, and a controller. The illumination source illuminates a local area with light emitted in accordance with emission instructions generated by the controller. The illumination source includes an array of optical sources and an optical assembly. Operation of each optical source in the array is controllable based in part on the emission instructions. The optical assembly is configured to project the light into the local area. The imaging device captures one or more images of at least a portion of the light reflected from one or more objects in the local area. The controller determines depth information for the one or more objects based in part on the captured one or more images.

    Dynamic dot array illuminators
    5.
    发明授权
    Dynamic dot array illuminators 有权

    公开(公告)号：US11747523B1

    公开(公告)日：2023-09-05

    申请号：US17370749

    申请日：2021-07-08

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Zhaoming Zhu

    IPC: G02B3/00 ,  G02B27/01 ,  H04N13/271 ,  H01S5/42 ,  H01S5/183

    CPC classification number: G02B3/0037 ,  G02B27/0172 ,  H04N13/271 ,  H01S5/183 ,  H01S5/423

    Abstract: A dot array illuminator includes an illumination source that includes one or more source arrays and a microlens array (MLA). A source array is an array of light emitting components. The source arrays are positioned on a substrate according to a geometric configuration. The MLA includes lens arrays that are arranged in a similar geometric configuration. The microlens array are separated from the source arrays by a distance and are substantially parallel to the source arrays. The microlens array overlaps with the source arrays and is of a dimension such that it can receive substantially all light emitted by the illumination source. The illumination source emits light towards the MLA. The MLA receives the light and outputs structured pattern light by interpolating received light.

    Switchable fringe pattern illuminator
    8.
    发明授权
    Switchable fringe pattern illuminator 有权

    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.

    Photonic integrated circuits with integrated optical conditioning elements
    9.
    发明授权
    Photonic integrated circuits with integrated optical conditioning elements 有权

    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.

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