US 12,013,531 B1
Active disparity sensing of head mounted display
Karol Constantine Hatzilias, Sammamish, WA (US); Tamer Elazhary, Redmond, WA (US); Yu Shi, Redmond, WA (US); Guohua Wei, Redmond, WA (US); Michiel Koen Callens, Mountain View, CA (US); and Nicholas Mcgee, Seattle, 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. 6, 2022, as Appl. No. 18/075,838.
Int. Cl. G02B 27/01 (2006.01)
CPC G02B 27/0101 (2013.01) [G02B 2027/014 (2013.01); G02B 2027/0147 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A near-eye optical assembly, comprising
a display waveguide configured to receive, from a first input coupler disposed on a first side of the display waveguide, display light and to direct the display light to an eye of a user via a first optical path within the display waveguide; and
an optical structure that includes:
a second input coupler disposed on a second side of the display waveguide and configured to receive a portion of the display light that propagates from the first input coupler to the second input coupler through the display waveguide;
an output coupler disposed to receive the portion of the display light from the second input coupler and to provide the portion of the display light to a disparity sense circuit; and
a second optical path separate from the first optical path and disposed between the second input coupler and the output coupler to direct the portion of the display light from the second input coupler to the output coupler.