US 12,276,776 B2
Optical imaging system
Lihui Ye, Yuyao (CN); Fujian Dai, Yuyao (CN); and Liefeng Zhao, Yuyao (CN)
Assigned to Zhejiang Sunny Optics Co., Ltd, (CN)
Filed by Zhejiang Sunny Optics Co., Ltd, Yuyao (CN)
Filed on Nov. 30, 2021, as Appl. No. 17/538,490.
Claims priority of application No. 202011494844.8 (CN), filed on Dec. 17, 2020.
Prior Publication US 2022/0196986 A1, Jun. 23, 2022
Int. Cl. G02B 9/64 (2006.01); G02B 13/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical imaging system, comprising, sequentially from an object side to an image side of the optical imaging system along an optical axis:
a first lens having a negative refractive power;
a second lens having a refractive power, an image-side surface of the second lens is convex surface;
a stop;
a third lens having a positive refractive power;
a fourth lens having a negative refractive power;
a fifth lens having a positive refractive power;
a sixth lens having a negative refractive power; and
a seventh lens having a positive refractive power,
wherein, a half of a maximal field-of-view Semi-FOV of the optical imaging system satisfies: Semi-FOV≥55°; and
a distance TTL from an object side surface of the first lens to an imaging plane of the optical imaging system along the optical axis and a half of a diagonal length ImgH of an effective pixel area on the imaging plane of the optical imaging system satisfy:
3.0<TTL/ImgH<3.5.