US 12,461,337 B2
Optical imaging lens assembly
Cheng Xing, Yuyao (CN); Litong Song, Yuyao (CN); Tingting Gong, 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 Dec. 22, 2021, as Appl. No. 17/560,241.
Claims priority of application No. 202110073683.3 (CN), filed on Jan. 20, 2021.
Prior Publication US 2022/0236522 A1, Jul. 28, 2022
Int. Cl. G02B 9/60 (2006.01); G02B 1/04 (2006.01); G02B 3/04 (2006.01); G02B 7/00 (2021.01); G02B 13/00 (2006.01)
CPC G02B 9/60 (2013.01) [G02B 1/041 (2013.01); G02B 3/04 (2013.01); G02B 7/008 (2013.01); G02B 13/0045 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An optical imaging lens assembly, comprising, sequentially from an object side to an image side of the optical imaging lens assembly along an optical axis:
a first lens having a negative refractive power, an object side surface of the first lens is convex surface and an image side surface of the first lens is a concave surface;
a stop;
a second lens having a positive refractive power, an object side surface of the second lens is a concave surface at a paraxial area and an image side surface of the second lens is a convex surface at the paraxial area;
a third lens having a refractive power;
a fourth lens having a refractive power, an object side surface of the fourth lens is a concave surface and an image side surface of the fourth lens is a convex surface; and
a fifth lens having a refractive power,
wherein a number of lenses having refractive powers in the optical imaging lens assembly is five;
an arrangement of the refractive powers of the third lens, the fourth lens and the fifth lens are negative-positive-negative, or positive-negative-positive, or positive-positive-negative;
a radius of curvature R1 of the object side surface of the first lens and a radius of curvature R2 of the image side surface of the first lens satisfy: 2.5<(R1+R2)/(R1−R2)<5.5;
a relative illuminance RI corresponding to a maximal field-of-view of the optical imaging lens assembly satisfies: RI≥50%;
wherein an effective focal length f4 of the fourth lens and a total effective focal length f of the optical imaging lens satisfy: 1.27≤|f4/f|<2.5;
wherein a radius of curvature R7 of the object side surface of the fourth lens and a radius of curvature R8 of the image side surface of the fourth lens satisfy: 2.5<|(R7+R8)/(R7−R8)|<6.5; and
at least one of the first lens to the fifth lens is a lens made of plastic material.