US 11,874,474 B1
Optical system for multi-view eye-tracking
Yun-Han Lee, Redmond, WA (US); Mengfei Wang, Seattle, WA (US); Junren Wang, Mercer Island, WA (US); Lu Lu, Kirkland, WA (US); Robin Sharma, Redmond, WA (US); Gregory Olegovic Andreev, Kirkland, WA (US); Garam Young, Sunnyvale, CA (US); Andrew John Ouderkirk, Kirkland, WA (US); Babak Amirsolaimani, Redmond, WA (US); Fenglin Peng, Redmond, WA (US); and Barry David Silverstein, Kirkland, WA (US)
Assigned to META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Sep. 11, 2020, as Appl. No. 17/018,579.
Claims priority of provisional application 62/907,351, filed on Sep. 27, 2019.
Int. Cl. G02B 27/01 (2006.01); G02B 27/42 (2006.01); G02B 27/28 (2006.01); G02F 1/31 (2006.01); H04N 23/55 (2023.01); H04N 23/75 (2023.01)
CPC G02B 27/0179 (2013.01) [G02B 27/0172 (2013.01); G02B 27/283 (2013.01); G02B 27/286 (2013.01); G02B 27/4205 (2013.01); G02F 1/31 (2013.01); H04N 23/55 (2023.01); H04N 23/75 (2023.01); G02B 2027/011 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/0187 (2013.01); G02F 2203/01 (2013.01); G02F 2203/07 (2013.01); G02F 2203/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a diffractive optical element including at least one substrate and a grating structure, the grating structure being configured to diffract a first light having an incidence angle within a predetermined range, and the at least one substrate being configured to reflect a second light; and
a polarization selective mechanism including an optical sensor, and configured to receive the first light diffracted by the diffractive optical element and the second light reflected by the at least one substrate, and generate images based on the first light and the second light, respectively.