Patent ID: 11960061
Assignee: AAC OPTICS (SUZHOU) CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. The camera optical lens according to claim 1, wherein the object-side surface of the second lens is concave in a paraxial region, the image-side surface of the second lens is concave in the paraxial region; and the camera optical lens further satisfies following conditions:

−1.32≤f2/f≤−0.40;

−1.87≤(R3+R4)/(R3−R4)≤−0.23; and

0.02≤d3/TTL≤0.07;

where
f2 denotes a focal length of the second lens;
d3 denotes an on-axis thickness of the second lens.