US 12,228,704 B2
Imaging lens, camera module and camera
Xuming Liu, Nanchang (CN); Tian Zhang, Nanchang (CN); Haojie Zeng, Nanchang (CN); and Jiyong Zeng, Nanchang (CN)
Assigned to JIANGXI LIANYI OPTICS CO., LTD., Nanchang (CN)
Filed by JIANGXI LIANYI OPTICS CO., LTD., Nanchang (CN)
Filed on Dec. 29, 2021, as Appl. No. 17/565,420.
Application 17/565,420 is a continuation in part of application No. PCT/CN2020/078023, filed on Mar. 5, 2020.
Claims priority of application No. 201910592465.3 (CN), filed on Jul. 3, 2019.
Prior Publication US 2022/0121014 A1, Apr. 21, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 9/60 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/60 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An imaging lens, wherein the imaging lens comprises five lenses, and from an object side to an imaging plane, the five lenses are as follows:
a first lens with a negative refractive power, wherein a paraxial region of an object side surface of the first lens is concave;
a second lens with a positive refractive power;
a third lens with a positive refractive power, wherein a paraxial region of an image side surface of the third lens is concave, and at least a portion away from an optical axis of the image side surface of the third lens is convex;
a fourth lens with a positive refractive power; and
a fifth lens with a negative refractive power;
wherein the imaging lens satisfies expressions:
3.163≤R6/R5<4;
0<f34/f<1;
6.682≤(V3−V5)<7;
0.797≤f2/f3<1; and
1.999≤|R4/R3|≤2.628;
where R5 represents a radius of curvature of an object side surface of the third lens, R6 represents a radius of curvature of the image side surface of the third lens, f34 represents a combined focal length of the third lens and the fourth lens, f represents a focal length of the imaging lens, V3 represents a dispersion coefficient of the third lens, V5 represents a dispersion coefficient of the fifth lens, f2 represents a focal length of the second lens, f3 represents a focal length of the third lens, R3 represents a radius of curvature of an object side surface of the second lens, and R4 represents a radius of curvature of an image side surface of the second lens.