US 11,747,591 B2
Camera optical lens
Wen Sun, Shenzhen (CN); and Jia Chen, Shenzhen (CN)
Assigned to AAC Optics (Changzhou) Co., Ltd., Changzhou (CN)
Filed by AAC Optics (Changzhou) Co., Ltd., Changzhou (CN)
Filed on Dec. 25, 2020, as Appl. No. 17/134,176.
Claims priority of application No. 202010867244.5 (CN), filed on Aug. 26, 2020.
Prior Publication US 2022/0066136 A1, Mar. 3, 2022
Int. Cl. G02B 9/60 (2006.01); G02B 13/18 (2006.01)
CPC G02B 9/60 (2013.01) [G02B 13/18 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A camera optical lens, comprising, from an object side to an image side:
a first lens having a positive refractive power;
a second lens having a negative refractive power;
a third lens having a positive refractive power;
a fourth lens having a positive refractive power; and
a fifth lens having a negative refractive power,
wherein at least one of the first lens to the fifth lens has a free-form surface, and the camera optical lens satisfies following conditions:
−3.50≤f2/f≤−1.50;
−2.00≤(R5+R6)/(R5−R6)≤0.20;
1.00≤f4/f≤5.50,
−5.62≤(R3+R4)/(R3−R4)≤−0.75; and
0.02≤d3/TTL≤0.08,
where f denotes a focal length of the camera optical lens, f2 denotes a focal length of the second lens, f4 denotes a focal length of the fourth lens, R5 denotes a central curvature radius of an object side surface of the third lens, R6 denotes a central curvature radius of an image side surface of the third lens, R3 denotes a central curvature radius of an object side surface of the second lens, R4 denotes a central curvature radius of an image side surface of the second lens, d3 denotes an on-axis thickness of the second lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.