US 12,007,569 B2
Compact catadioptric projector
Miller Schuck, Erie, CO (US); and Robert Matthew Bates, Erie, CO (US)
Assigned to Snap Inc., Santa Monica, CA (US)
Filed by Snap Inc., Santa Monica, CA (US)
Filed on Apr. 26, 2023, as Appl. No. 18/139,736.
Application 18/139,736 is a continuation of application No. 17/952,485, filed on Sep. 26, 2022, granted, now 11,681,148.
Application 17/952,485 is a continuation of application No. 17/473,536, filed on Sep. 13, 2021, granted, now 11,480,800, issued on Oct. 25, 2022.
Prior Publication US 2023/0266596 A1, Aug. 24, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 27/01 (2006.01); G02B 5/30 (2006.01); G02B 27/28 (2006.01); G02C 11/00 (2006.01); G09G 3/00 (2006.01); G06F 3/01 (2006.01); H04N 13/239 (2018.01)
CPC G02B 27/0172 (2013.01) [G02B 5/3083 (2013.01); G02B 27/283 (2013.01); G02C 11/10 (2013.01); G09G 3/002 (2013.01); G02B 2027/014 (2013.01); G02B 2027/0178 (2013.01); G06F 3/012 (2013.01); G06F 3/013 (2013.01); H04N 13/239 (2018.05)] 20 Claims
OG exemplary drawing
 
1. A prism, comprising:
a first total internal reflection (TIR) prism configured to route light from a light source;
a second TIR prism coupled to the first TIR prism at an interface and configured to route the light from the first TIR prism to a display;
a polarizing beamsplitter disposed at the interface between the first and second TIR prisms; and
a quarter-wave plate configured to receive the light from the second TIR prism, wherein the second TIR prism is configured to direct reflected light from the quarter-wave plate to an output.