US 12,265,319 B2
Laser source assembly and laser projection apparatus
Wei Li, Qingdao (CN); Youliang Tian, Qingdao (CN); and Tiantian Tang, Qingdao (CN)
Assigned to Hisense Laser Display Co., Ltd, Qingdao (CN)
Filed by Hisense Laser Display Co., Ltd, Qingdao (CN)
Filed on Sep. 29, 2022, as Appl. No. 17/936,502.
Application 17/936,502 is a continuation of application No. PCT/CN2021/103532, filed on Jun. 30, 2021.
Claims priority of application No. 202011597569.2 (CN), filed on Dec. 29, 2020.
Prior Publication US 2023/0028602 A1, Jan. 26, 2023
Int. Cl. G03B 21/20 (2006.01); G02B 5/30 (2006.01); G02B 13/06 (2006.01); G02B 27/10 (2006.01); G02B 27/30 (2006.01)
CPC G03B 21/2033 (2013.01) [G02B 5/3025 (2013.01); G02B 13/06 (2013.01); G02B 27/102 (2013.01); G02B 27/30 (2013.01); G03B 21/2013 (2013.01); G03B 21/2066 (2013.01); G03B 21/208 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A laser source assembly, comprising:
a plurality of lasers configured to emit laser beams;
a light combining assembly disposed on a light exit side of the plurality of lasers and configured to combine the laser beams; and
a fly-eye lens disposed on a light exit side of the light combining assembly and configured to homogenize the laser beams; the fly-eye lens including:
a plurality of first microlenses located on a light incident surface of the fly-eye lens, and
a plurality of second microlenses located on a light exit surface of the fly-eye lens, the plurality of first microlenses corresponding to the plurality of second microlenses;
wherein a sine value of a divergence angle of a laser beam in a fast axis direction is greater than a sine value of an aperture angle of a first microlens from the plurality of first microlenses in a slow axis direction, and a sine value of a divergence angle of the laser beam in the slow axis direction is greater than a sine value of an aperture angle of the first microlens in the fast axis direction.