US 12,416,811 B1
Optical system and display device
Yi Rao, Weifang (CN); Chaiyuan Shi, Weifang (CN); and Xiaoyue Liu, Weifang (CN)
Assigned to GOERTEK OPTICAL TECHNOLOGY CO., LTD., Weifang (CN)
Filed by GOERTEK OPTICAL TECHNOLOGY CO., LTD., Shandong (CN)
Filed on Feb. 27, 2025, as Appl. No. 19/065,913.
Claims priority of application No. 202410764070.8 (CN), filed on Jun. 14, 2024.
Int. Cl. G02B 1/10 (2015.01); G02B 9/34 (2006.01); G02B 27/01 (2006.01); G02B 27/09 (2006.01); G02B 27/28 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 27/0955 (2013.01); G02B 27/283 (2013.01); G02B 27/286 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An optical system, comprising:
a beam splitter;
a phase retarder;
a polarization reflection element;
a lens group; and
a second lens;
wherein the beam splitter, the phase retarder and the polarization reflection element are provided along a same optical axis, and the phase retarder is provided between the beam splitter and the polarization reflection element;
the lens group and the second lens are provided along the optical axis, the lens group at least comprises a first lens, and the first lens is provided on a side of the beam splitter away from the phase retarder;
the first lens satisfies: 0.7≤|H1−H0|/|H2−H0|≤3, wherein H1 is a maximum thickness of the first lens at a specific aperture, H2 is a thickness of the first lens at an optical aperture of 1.0, and H0 is a center thickness of the first lens; and
the maximum thickness of the first lens at a specific aperture is a maximum thickness of the first lens at an optical aperture of 0.35 to 0.67.