US 12,135,429 B2
Pupil-steering for three-dimensional (3D) resolution enhancement in single photon avalanche diode (SPAD) eye tracking (ET)
Yatong An, Redmond, WA (US); Youmin Wang, Bellevue, WA (US); and Zhaoyu Nie, Kenmore, WA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Dec. 8, 2022, as Appl. No. 18/077,653.
Prior Publication US 2024/0192493 A1, Jun. 13, 2024
Int. Cl. G02B 27/01 (2006.01); G02B 26/08 (2006.01); G06F 1/16 (2006.01); G06F 3/01 (2006.01); G06T 3/4007 (2024.01); G06T 3/4038 (2024.01); G06T 3/4053 (2024.01); H04N 23/56 (2023.01)
CPC G02B 27/0172 (2013.01) [G02B 26/0833 (2013.01); G02B 27/0179 (2013.01); G06F 1/163 (2013.01); G06F 3/013 (2013.01); G06T 3/4007 (2013.01); G06T 3/4038 (2013.01); G06T 3/4053 (2013.01); H04N 23/56 (2023.01); G02B 2027/0138 (2013.01); G02B 2027/014 (2013.01); G02B 2027/0147 (2013.01); G02B 2027/0178 (2013.01); G02B 2027/0187 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An eye tracking system, comprising:
a light source to direct light to a visible surface of an eye;
a first mirror and a second mirror to redirect the light reflected from at least a portion of the visible surface of the eye;
a sensor to capture the redirected light; and
a processor:
steer at least one of the first mirror, the second mirror, or the sensor to cause the sensor to capture a plurality of images of distinct portions of the visible surface of the eye, wherein the distinct portions of the visible surface of the eye together cover substantially an entire visible surface of the eye, and
generate a full-view image of the entire visible surface of the eye through stitching the plurality of images of the distinct portions of the visible surface of the eye captured by the sensor.