US 11,933,975 B2
Eye tracking based on waveguide imaging
Babak Amirsolaimani, Redmond, WA (US); Pasi Saarikko, Kirkland, WA (US); Ying Geng, Bellevue, WA (US); Yusufu Njoni Bamaxam Sulai, Snohomish, WA (US); and Scott Charles McEldowney, 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 Feb. 22, 2022, as Appl. No. 17/677,406.
Application 17/677,406 is a continuation of application No. 16/359,117, filed on Mar. 20, 2019, granted, now 11,256,086.
Claims priority of provisional application 62/804,136, filed on Feb. 11, 2019.
Claims priority of provisional application 62/804,126, filed on Feb. 11, 2019.
Claims priority of provisional application 62/673,805, filed on May 18, 2018.
Prior Publication US 2022/0179206 A1, Jun. 9, 2022
Int. Cl. G02B 27/00 (2006.01); F21V 8/00 (2006.01); G02B 6/10 (2006.01); G02B 6/27 (2006.01); G02B 6/35 (2006.01); G02B 6/42 (2006.01); G02B 23/12 (2006.01); G02B 27/01 (2006.01); G06F 3/01 (2006.01); G06T 7/70 (2017.01)
CPC G02B 27/0093 (2013.01) [G02B 6/0056 (2013.01); G02B 6/105 (2013.01); G02B 6/27 (2013.01); G02B 6/356 (2013.01); G02B 6/42 (2013.01); G02B 6/4206 (2013.01); G02B 23/125 (2013.01); G02B 27/0172 (2013.01); G06F 3/013 (2013.01); G06T 7/70 (2017.01); G02B 2027/011 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/0174 (2013.01); G02B 2027/0178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical system, comprising:
an optical waveguide;
a first optical element configured to direct a first ray, from an eye, having a first circular polarization and impinging on the first optical element in a first direction to a second direction and direct a second ray, from the eye, having a second circular polarization that is distinct from the first circular polarization and impinging on the first optical element in the first direction to a third direction distinct from the second direction so that one of the first ray or the second ray propagates through the optical waveguide via total internal reflection and the other of the first ray or the second ray is transmitted through the optical waveguide; and
a second optical element positioned to steer a ray propagating through the optical waveguide for exiting from the optical waveguide.