US 12,449,614 B1
Optical systems with one dimensional eye tracking
Itai Afek, Ramat Gan (IL); Ariel Lipson, Tel Aviv (IL); Daniel Ott, Boulder, CO (US); Maria I Campana, Boulder, CO (US); Roei Remez, Tel Aviv (IL); Lionel E Edwin, San Jose, CA (US); and Michael Young, Broomfield, CO (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Nov. 30, 2023, as Appl. No. 18/525,306.
Claims priority of provisional application 63/476,782, filed on Dec. 22, 2022.
Int. Cl. G02B 6/42 (2006.01); H04N 23/20 (2023.01)
CPC G02B 6/4206 (2013.01) [H04N 23/20 (2023.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a waveguide;
one or more light sources configured to emit first infrared light collimated at a first angle with respect to a first axis and configured to emit second infrared light collimated at a second angle with respect to the first axis, wherein the second angle is different from the first angle and the first and second infrared light is divergent along a second axis orthogonal to the first axis;
an input coupler configured to couple the first and second infrared light into the waveguide;
a first one-dimensional diffractive grating on the waveguide and configured to diffract the first infrared light out of the waveguide at a third angle with respect to the first axis; and
a second one-dimensional diffractive grating overlapping the first one-dimensional diffractive grating on the waveguide, wherein the second one-dimensional diffractive grating is configured to diffract the second infrared light out of the waveguide at a fourth angle with respect to the first axis, the fourth angle being different from the third angle.