US 12,455,447 B2
Eye tracking
Ioannis Papadopoulos, Eindhoven (NL); Daniel Najer, Eindhoven (NL); Volker Zagolla, Eindhoven (NL); and Ferran Suarez, Eindhoven (NL)
Assigned to AMS INTERNATIONAL AG, Jona (CH)
Appl. No. 18/562,509
Filed by ams International AG, Jona (CH)
PCT Filed May 13, 2022, PCT No. PCT/EP2022/063018
§ 371(c)(1), (2) Date Nov. 20, 2023,
PCT Pub. No. WO2022/243185, PCT Pub. Date Nov. 24, 2022.
Claims priority of application No. 2107231 (GB), filed on May 20, 2021.
Prior Publication US 2024/0255753 A1, Aug. 1, 2024
Int. Cl. G02B 27/00 (2006.01); G01S 7/481 (2006.01); G01S 17/58 (2006.01); G02B 27/01 (2006.01); G02B 27/09 (2006.01); G06F 3/01 (2006.01)
CPC G02B 27/0093 (2013.01) [G01S 7/4811 (2013.01); G01S 17/58 (2013.01); G02B 27/0172 (2013.01); G02B 27/0955 (2013.01); G02B 27/0977 (2013.01); G06F 3/013 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An eye tracking device for integrating in a frame for mounting to a user's head, the device comprising:
a laser output unit for fixing to the frame and configured to provide at least three spatially separated laser beams for illuminating a cornea of the user's eye when in use;
a receiver unit for fixing to the frame and configured to receive reflections of the at least three spatially separated laser beams and to provide a tracking signal usable for determining a distance or velocity of the cornea; and
a processing unit, configured to determine a direction of rotation of the user's eye from the tracking signal based on a change of a length of an optical path between the cornea and the receiver unit of at least one of the at least three spatially separated laser beams,
wherein the at least three spatially separated laser beams are separated by an angular distance in the range of 15° to 20° on the cornea of the user's eye when in use.