US 11,860,358 B2
Angular light sensor and eye-tracking
Liliana Ruiz Diaz, Redmond, WA (US); Ruiting Huang, Redmond, WA (US); Robin Sharma, Redmond, WA (US); Jonathan Robert Peterson, Woodinville, WA (US); Christopher Yuan Ting Liao, Seattle, WA (US); Andrew John Ouderkirk, Redmond, WA (US); Giancarlo Sigurd Sante Nucci, Seattle, WA (US); and Clare Joyce Robinson, Bellevue, WA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Aug. 1, 2022, as Appl. No. 17/878,634.
Claims priority of provisional application 63/232,674, filed on Aug. 13, 2021.
Prior Publication US 2023/0053107 A1, Feb. 16, 2023
Int. Cl. G02B 27/00 (2006.01); G02B 27/01 (2006.01)
CPC G02B 27/0093 (2013.01) [G02B 27/0179 (2013.01); G02B 2027/0187 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An eye-tracking system comprising:
a plurality of infrared light sources configured to emit infrared illumination light to an eyebox region; and
a plurality of angular light sensors configured to receive returning infrared light that is the infrared illumination light reflecting from the eyebox region, wherein the angular light sensors in the plurality are configured to output angular signals representing an angle of incidence of the returning infrared light with respect to positions of the angular light sensors,
wherein each infrared light source is paired with an angular light sensor and separated by less than 500 microns.