US 12,405,473 B2
Optical systems with reflective prism input couplers
Vikrant Bhakta, Santa Clara, CA (US); Guolin Peng, Sunnyvale, CA (US); Hyungryul Choi, San Jose, CA (US); Kevin A. Keilbach, Boulder, CO (US); and Scott M. DeLapp, San Diego, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Apr. 19, 2024, as Appl. No. 18/641,244.
Application 18/641,244 is a continuation of application No. 17/477,321, filed on Sep. 16, 2021, granted, now 11,994,681.
Application 17/477,321 is a continuation of application No. PCT/US2020/050709, filed on Sep. 14, 2020.
Claims priority of provisional application 62/902,645, filed on Sep. 19, 2019.
Prior Publication US 2024/0272438 A1, Aug. 15, 2024
Int. Cl. G02B 6/00 (2006.01); F21V 8/00 (2006.01); G02B 27/01 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 6/0016 (2013.01); G02B 6/003 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0147 (2013.01); G02B 2027/0163 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a projector configured to output light;
a waveguide;
an input coupler comprising a prism configured to couple the light into the waveguide, the waveguide being configured to propagate the light via total internal reflection; and
an optical wedge optically coupled between the projector and the waveguide, wherein the optical wedge is configured to direct the light from the projector towards the input coupler.