The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 2026
Filed:
Mar. 18, 2024
Meta Platforms Technologies, Llc, Menlo Park, CA (US);
Jian Xu, Redmond, WA (US);
Xiang Li, Redmond, WA (US);
Miaomiao Xu, Redmond, WA (US);
Xingzhou Tu, Redmond, WA (US);
Shaobai Li, Redmond, WA (US);
Xiayu Feng, Kirkland, WA (US);
Wanli Chi, Sammamish, WA (US);
Wai Sze Tiffany Lam, Lynnwood, WA (US);
Meta Platforms Technologies, LLC, Menlo Park, CA (US);
Abstract
A system is provided. The system includes a light source configured to emit a infrared ('IR') light for illuminating an object. The system also includes a waveguide imaging assembly including a waveguide, an in-coupling element disposed at a first portion of the waveguide, an out-coupling element disposed at a second portion of the waveguide, and an optical sensor disposed facing the out-coupling element. The in-coupling element is configured to couple the IR light reflected by the object into the waveguide, the waveguide is configured to guide the IR light to propagate toward the out-coupling element through total internal reflection, and the out-coupling element is configured to couple the IR light out of the waveguide toward the optical sensor. The optical sensor is configured to generate a tracking signal of the object based on the IR light output from the waveguide.