US 12,235,419 B2
Optical imaging lens group
Yifu Cheng, Yuyao (CN); Mengna Tang, Yuyao (CN); Jianke Wenren, 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. 18, 2021, as Appl. No. 17/529,822.
Claims priority of application No. 202011464092.0 (CN), filed on Dec. 14, 2020.
Prior Publication US 2022/0187579 A1, Jun. 16, 2022
Int. Cl. G02B 13/06 (2006.01); G02B 9/64 (2006.01); G02B 13/00 (2006.01)
CPC G02B 13/06 (2013.01) [G02B 9/64 (2013.01); G02B 13/0045 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical imaging lens group, comprising, sequentially along an optical axis from an object side to an image side:
a first lens, having a refractive power, an object-side surface of the first lens being a concave surface;
a second lens, having a positive refractive power, wherein an object-side surface of the second lens is a convex surface;
a third lens, having a refractive power, an image-side surface of the third lens being a concave surface;
a fourth lens, having a refractive power;
a fifth lens, having a positive refractive power, wherein an object-side surface of the fifth lens is a convex surface, and an image-side surface of the fifth lens is a convex surface;
a sixth lens, having a negative refractive power;
a seventh lens, having a refractive power, wherein an object-side surface of the seventh lens is a convex surface, and an image-side surface of the seventh lens is a convex surface; and
an eighth lens, having a negative refractive power, wherein an image-side surface of the eighth lens is a concave surface,
wherein a number of lenses having refractive powers in the optical imaging lens group is eight,
half of a maximal field-of-view Semi-FOV of the optical imaging system satisfies: Semi-FOV>60°, and
an optical distortion Dist. of the optical imaging system satisfies: |Dist.|≤5.1%.