US 12,443,032 B2
Eye tracking with switchable gratings
Sihui He, Sunnyvale, CA (US); Jacques Gollier, Sammamish, WA (US); Maxwell Parsons, Seattle, WA (US); Babak Amirsolaimani, Redmond, WA (US); Wanli Chi, Sammamish, WA (US); Daniel Guenther Greif, Redmond, WA (US); Renate Eva Klementine Landig, Seattle, WA (US); Xiayu Feng, Kirkland, WA (US); Zhimin Shi, Bellevue, WA (US); Nicholas John Diorio, Duvall, WA (US); Yang Yang, Redmond, WA (US); Giuseppe Calafiore, Redmond, WA (US); Fenglin Peng, Redmond, WA (US); Tanya Malhotra, Redmond, WA (US); and Andrew John Ouderkirk, Redmond, WA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Mar. 17, 2022, as Appl. No. 17/697,600.
Claims priority of provisional application 63/286,230, filed on Dec. 6, 2021.
Claims priority of provisional application 63/286,381, filed on Dec. 6, 2021.
Prior Publication US 2023/0176444 A1, Jun. 8, 2023
Int. Cl. G06T 7/00 (2017.01); F21V 8/00 (2006.01); G01B 11/22 (2006.01); G01S 7/4865 (2020.01); G01S 17/10 (2020.01); G02B 6/35 (2006.01); G02B 26/08 (2006.01); G02B 27/00 (2006.01); G02B 27/01 (2006.01); G02B 27/42 (2006.01); G02B 27/44 (2006.01); G02F 1/1335 (2006.01); G02F 1/29 (2006.01); G02F 1/33 (2006.01); G02F 1/335 (2006.01); G03H 1/02 (2006.01); G06F 1/16 (2006.01); G06F 3/01 (2006.01); G06T 3/4038 (2024.01); G06T 7/246 (2017.01); G09G 3/00 (2006.01); G09G 3/34 (2006.01); H04N 23/56 (2023.01); H04N 23/698 (2023.01); H04N 23/10 (2023.01)
CPC G02B 27/0093 (2013.01) [G01B 11/22 (2013.01); G01S 7/4865 (2013.01); G01S 17/10 (2013.01); G02B 6/0016 (2013.01); G02B 6/0031 (2013.01); G02B 6/0035 (2013.01); G02B 6/005 (2013.01); G02B 6/0066 (2013.01); G02B 6/3518 (2013.01); G02B 26/0816 (2013.01); G02B 27/0081 (2013.01); G02B 27/0172 (2013.01); G02B 27/0179 (2013.01); G02B 27/4205 (2013.01); G02B 27/44 (2013.01); G02F 1/133504 (2013.01); G02F 1/133526 (2013.01); G02F 1/292 (2013.01); G02F 1/294 (2021.01); G02F 1/33 (2013.01); G02F 1/335 (2013.01); G03H 1/0248 (2013.01); G06F 1/163 (2013.01); G06F 3/013 (2013.01); G06T 3/4038 (2013.01); G06T 7/246 (2017.01); G09G 3/002 (2013.01); G09G 3/3413 (2013.01); H04N 23/56 (2023.01); H04N 23/698 (2023.01); G02B 2027/0105 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/0174 (2013.01); G02B 2027/0178 (2013.01); G02B 2027/0187 (2013.01); G06T 2207/30201 (2013.01); G09G 2310/0235 (2013.01); H04N 23/10 (2023.01)] 20 Claims
OG exemplary drawing
 
1. An eye tracking system for determining at least one of a position or orientation of an eye at an eyebox, the eye tracking system comprising:
a light source for providing illuminating light;
a switchable grating structure optically coupled to the light source for receiving and redirecting the illuminating light to a location of the eye at an eyebox; and
an eye tracking camera configured for obtaining images of the eye at the eyebox by detecting the illuminating light redirected by the switchable grating and reflected by the eye.