US 11,747,640 B2
Optical module, near-eye display device and light projection method
Qianyi Liang, Shanghai (CN); Hao Wu, Shanghai (CN); and Xingpeng Yang, Shanghai (CN)
Assigned to Shanghai UROptics Co. Ltd., Shanghai (CN)
Filed by Shanghai UROptics Co. Ltd., Shanghai (CN)
Filed on Aug. 30, 2021, as Appl. No. 17/461,119.
Claims priority of application No. 202011061771.3 (CN), filed on Sep. 30, 2020; application No. 202022206054.7 (CN), filed on Sep. 30, 2020; application No. 202011210641.1 (CN), filed on Nov. 3, 2020; application No. 202022504347.3 (CN), filed on Nov. 3, 2020; and application No. 202121273674.0 (CN), filed on Jun. 8, 2021.
Prior Publication US 2022/0099988 A1, Mar. 31, 2022
Int. Cl. G02B 27/28 (2006.01); G02B 27/01 (2006.01); G02B 26/06 (2006.01); H04N 9/31 (2006.01)
CPC G02B 27/283 (2013.01) [G02B 26/06 (2013.01); G02B 27/0172 (2013.01); H04N 9/3152 (2013.01); H04N 9/3167 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical module, comprising:
a partial reflector, receiving circularly polarized light or elliptically polarized light, wherein part of the circularly polarized light or elliptically polarized light is reflected and part of the circularly polarized light or elliptically polarized light transmits through the partial reflector;
a second phase delay unit, located downstream of an optical path of the partial reflector so as to receive and modulate the transmitting circularly polarized light or elliptically polarized light before emission; and
a polarized beam splitter, disposed downstream of an optical path of the second phase delay unit, the polarized beam splitter having a light transmission axis,
wherein the optical module further comprises a second phase compensation unit located between the second phase delay unit and the polarized beam splitter, and wherein an optical axis of the second phase compensation unit is located in a plane orthogonal to the light transmission axis of the polarized beam splitter, or in a plane orthogonal to a light reflection axis of the polarized beam splitter.