US 12,449,897 B2
Eye tracking system
Kathrin Berkner-Cieslicki, Los Altos, CA (US); Se Baek Oh, Cupertino, CA (US); Scott M. DeLapp, Cupertino, CA (US); Christopher F. Griffo, Cupertino, CA (US); Bradley C. Steele, Cupertino, CA (US); Ting Sun, Cupertino, CA (US); Kenichi Saito, Cupertino, CA (US); and Noah D. Bedard, Pacifica, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Oct. 24, 2023, as Appl. No. 18/493,482.
Application 18/493,482 is a continuation of application No. 17/718,083, filed on Apr. 11, 2022, granted, now 11,829,528.
Application 17/718,083 is a continuation of application No. 16/984,040, filed on Aug. 3, 2020, granted, now 11,360,557, issued on Jun. 14, 2022.
Claims priority of provisional application 62/883,553, filed on Aug. 6, 2019.
Prior Publication US 2024/0053823 A1, Feb. 15, 2024
Int. Cl. G06F 3/01 (2006.01); G02B 27/00 (2006.01); G02B 27/01 (2006.01)
CPC G06F 3/013 (2013.01) [G02B 27/0093 (2013.01); G02B 27/0172 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/014 (2013.01); G02B 2027/0174 (2013.01); G02B 2027/0187 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a head-mounted device comprising:
left and right eyepieces located in front of a user's left and right eyes;
one or more infrared light sources configured to emit infrared light towards the user's eyes;
left and right infrared cameras;
left and right diffraction gratings located at the left and right eyepieces, wherein the left and right diffraction gratings are configured to redirect infrared light returned from the user's eyes towards the left and right infrared cameras, respectively; and
wherein the left and right infrared cameras are located farther from the left and right eyepieces than the one or more infrared light sources and are configured to capture a portion of the infrared light redirected by the left and right diffraction gratings to generate images of the user's eyes.