Invention Grant
- Patent Title: Shifting diffractive optical element for adjustable depth sensing resolution
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Application No.: US16743685Application Date: 2020-01-15
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Publication No.: US11450015B2Publication Date: 2022-09-20
- Inventor: Andrew Matthew Bardagjy , Joseph Duggan , Cina Hazegh , Fei Liu , Mark Timothy Sullivan , Simon Morris Shand Weiss
- Applicant: Meta Platforms Technologies, LLC
- Applicant Address: US CA Menlo Park
- Assignee: Meta Platforms Technologies, LLC
- Current Assignee: Meta Platforms Technologies, LLC
- Current Assignee Address: US CA Menlo Park
- Agency: Fenwick & West LLP
- Main IPC: G06T7/521
- IPC: G06T7/521 ; G02B27/01 ; G02B26/08 ; G02B27/42 ; G02B27/30 ; H04N5/225

Abstract:
A depth camera assembly for depth sensing of a local area includes a structured light generator, an imaging device, and a controller. The structured light generator illuminates a local area with structured light and includes an illumination source, a mounting element, and a diffractive optical element (DOE) mounted on the mounting element. The mounting element can have a plurality of adjustable positions relative to the illumination source based on emission instructions from the controller. The DOE generates, using light emitted from the illumination source, diffracted scanning beams that are projected as the structured light into the local area. A pattern of the structured light is dynamically adjustable and unique for each adjustable position of the mounting element. The imaging device captures image(s) of the structured light reflected from object(s) in the local area. The controller determines depth information for the object(s) based in part on the captured image(s).
Public/Granted literature
- US20200151892A1 SHIFTING DIFFRACTIVE OPTICAL ELEMENT FOR ADJUSTABLE DEPTH SENSING RESOLUTION Public/Granted day:2020-05-14
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