US 12,449,640 B2
Camera optical lens
Takaaki Teranishi, Osaka (JP)
Assigned to AAC Optics (Suzhou) Co., Ltd., Suzhou (CN)
Filed by AAC Optics (Suzhou) Co., Ltd., Suzhou (CN)
Filed on May 11, 2022, as Appl. No. 17/741,490.
Claims priority of application No. 2021-140766 (JP), filed on Aug. 31, 2021.
Prior Publication US 2023/0076657 A1, Mar. 9, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A camera optical lens comprising, from an object side to an image side in sequence, a first lens having negative refractive power, a second lens having positive refractive power, a third lens having positive refractive power, a fourth lens having negative refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power and a seventh lens having negative refractive power; wherein the camera optical lens satisfies conditions of:
−21.27≤R1/d1≤−18.00;
1.42≤f2/f≤1.96; and
2.70≤f4/f1≤10.10;
where
f denotes a focal length of the camera optical lens;
f1 denotes a focal length of the first lens;
f2 denotes a focal length of the second lens;
f4 denotes a focal length of the fourth lens;
R1 denotes a central curvature radius of an object-side surface of the first lens;
d1 denotes an on-axis thickness of the first lens.