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:
Sep. 24, 2024
Filed:
Dec. 13, 2021
Applicant:
Meta Platforms Technologies, Llc, Menlo Park, CA (US);
Inventors:
Sihui He, Sunnyvale, CA (US);
Maxwell Parsons, Seattle, WA (US);
Fenglin Peng, Redmond, WA (US);
Miaomiao Xu, Redmond, WA (US);
Yang Yang, Redmond, WA (US);
Yu Shi, Redmond, WA (US);
Dianmin Lin, Los Altos, CA (US);
Assignee:
Meta Platforms Technologies, LLC, Menlo Park, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); G02B 5/18 (2006.01); G02B 5/32 (2006.01); G02B 6/42 (2006.01); G02B 27/00 (2006.01); F21V 8/00 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0172 (2013.01); G02B 5/1842 (2013.01); G02B 5/32 (2013.01); G02B 6/4206 (2013.01); G02B 6/4213 (2013.01); G02B 27/0081 (2013.01); G02B 6/0018 (2013.01); G02B 6/0036 (2013.01); G02B 2027/0174 (2013.01); G02B 2027/0178 (2013.01);
Abstract
A waveguide is provided. The waveguide includes a substrate having two outer surfaces for propagating a beam of light in the substrate by reflecting the beam from the two outer surfaces. The waveguide includes at least one polarization volume hologram (PVH) grating to couple light in and/or out of the waveguide. The PVH grating may be a multi-layer PVH grating with graded birefringence.