US 12,270,972 B2
Optical lens, camera module and terminal
Xiaozhi Yu, Nanchang (CN); Haojie Zeng, Nanchang (CN); Xuming Liu, 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 Jul. 15, 2021, as Appl. No. 17/376,196.
Application 17/376,196 is a continuation in part of application No. PCT/CN2021/088766, filed on Apr. 21, 2021.
Claims priority of application No. 202010433363.X (CN), filed on May 21, 2020.
Prior Publication US 2021/0364758 A1, Nov. 25, 2021
Int. Cl. G02B 13/00 (2006.01); G02B 9/62 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical lens, along an optical axis from an object side to an imaging surface, sequentially comprising:
a stop;
a first lens, wherein the first lens has a positive focal power, an object side surface of the first lens is convex, a paraxial region of an image side surface of the first lens is concave, and the image side surface of the first lens has at least one inflection point;
a second lens, wherein the second lens has a negative focal power, a paraxial region of an object side surface of the second lens is convex, and an image side surface of the second lens is concave;
a third lens, wherein the third lens has a positive focal power, a paraxial region of an object side surface of the third lens is convex, and an image side surface of the third lens is convex;
a fourth lens, wherein the fourth lens has a negative focal power, an object side surface of the fourth lens is concave, and an image side surface of the fourth lens is convex;
a fifth lens, wherein the fifth lens has a positive focal power, a paraxial region of an object side surface of the fifth lens is convex, and a paraxial region of an image side surface of the fifth lens is convex, and both the object side surface and the image side surface of the fifth lens have at least one inflection point; and
a sixth lens, wherein the sixth lens has a negative focal power, a paraxial region of an object side surface of the sixth lens is concave, a paraxial region of an image side surface of the sixth lens is concave, and the image side surface of the sixth lens has at least one inflection point;
wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are aspherical lenses;
wherein the optical lens meets the expressions:
4.4 mm<(TTL/IH)×f<4.6 mm; and
0.02 mm<SAG2max−SAG2<0.04 mm;
where TTL represents a distance on the optical axis from the object side surface of the first lens to the imaging surface, IH represents half an actual image height of the optical lens on the imaging surface, f represents a focal length of the optical lens, SAG2max represents a maximum sagittal depth of the image side surface of the first lens, and SAG2 represents a fringe sagittal depth of the image side surface of the first lens.