US 12,265,232 B2
Beam-splitting optical module and manufacturing method thereof
Qun Luo, Zhejiang Province (CN); Xingpeng Yang, Zhejiang Province (CN); and Ming Yuan, Zhejiang Province (CN)
Assigned to Hangzhou UPhoton OPtoelectronics Technology Co., Ltd., Zhejiang Province (CN)
Appl. No. 17/431,060
Filed by Hangzhou UPhoton Optoelectronics Technology Co., Ltd., Zhejiang Province (CN)
PCT Filed Jan. 10, 2020, PCT No. PCT/CN2020/071453
§ 371(c)(1), (2) Date Aug. 13, 2021,
PCT Pub. No. WO2020/164346, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 201910114770.1 (CN), filed on Feb. 14, 2019; and application No. 201920197392.3 (CN), filed on Feb. 14, 2019.
Prior Publication US 2022/0075200 A1, Mar. 10, 2022
Int. Cl. G02B 27/42 (2006.01); G02B 27/10 (2006.01); G02B 27/28 (2006.01)
CPC G02B 27/4233 (2013.01) [G02B 27/1086 (2013.01); G02B 27/283 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A beam-splitting optical module, comprising:
a light-emitting device, wherein the light-emitting device comprises a polarization modulation element so as to modulate light beams from a single point light source into polarized light in multiple directions;
a diffractive optical element provided in a light exit path of the light-emitting device, and configured to modulate incident light to project at least two groups of light beams, and form, on a target surface, at least two groups of light spots, a number of the at least two groups of light spots corresponds to that of the light beams,
wherein polarization directions of the at least two groups of light beams are different, and optical distances from the light-emitting device to the target surface are different; and
a polarization beam-splitting element provided between the light-emitting device and the diffractive optical element, and configured to split received light into at least two groups of polarized light in different polarization directions, a number of the at least two groups of polarized light corresponds to that of the at least two groups of light beams, the diffractive optical element being configured to receive the at least two groups of polarized light, and modulate and project the at least two groups of light beams.