US 12,204,089 B2
Eyepiece optical structure, eyepiece system and optical device
Huajun Peng, Shenzhen (CN); Hongpeng Cao, Shenzhen (CN); and Jianfei Guo, Shenzhen (CN)
Assigned to Shenzhen NED Optics Co., Ltd, Shenzhen (CN)
Filed by Shenzhen NED Optics Co., Ltd, Shenzhen (CN)
Filed on Jan. 11, 2023, as Appl. No. 18/153,063.
Claims priority of application No. 202210029486.6 (CN), filed on Jan. 12, 2022.
Prior Publication US 2023/0244073 A1, Aug. 3, 2023
Int. Cl. G02B 25/00 (2006.01)
CPC G02B 25/001 (2013.01) 13 Claims
OG exemplary drawing
 
1. An eyepiece optical structure, comprising a lens group T1 on which an optical binary surface pattern and a Fresnel surface pattern distributed in a direction from a human eye viewing side to a display device side are arranged:
wherein the lens group T1 has a focal length of F and a clear aperture of D, and F and D satisfy the following relational expression: 1.9≤F/D;
the optical binary surface pattern has a focal length of F2 and a radius value of R2; F and F2 satisfy the following relational expression: −120<F2/F<10.78; and F2 and R2 satisfy the following relational expression: 0.5≤F2/R2≤14.50;
the Fresnel surface pattern has a focal length of F3 and a radius value of R3, and F3 and R3 satisfy the following relational expression:
−1.88≤F3/R3≤−0.010;
the lens group T1 is composed of a first lens; and in the direction from the human eye viewing side to the display device side, the surfaces at two sides of the first lens are respectively provided with the optical binary surface pattern and the Fresnel surface pattern.