Patent ID: 11892597
Assignee: CHANGZHOU RAYTECH OPTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A camera optical lens, comprising from an object side to an image side:
a first lens having positive refractive power;
a second lens having negative refractive power;
a third lens having positive refractive power;
a fourth lens having negative refractive power;
a fifth lens having positive refractive power;
a sixth lens having negative refractive power;
a seventh lens having positive refractive power;
an eighth lens having positive refractive power; and
a ninth lens having negative refractive power,
wherein the camera optical lens satisfies the following conditions:

2.20≤f1/f≤5.00;

(R7+R8)/(R7−R8)≤−1.90; and

3.00≤d13/d14≤15.00,

where
f denotes a focal length of the camera optical lens;
f1 denotes a focal length of the first lens;
R7 denotes a central curvature radius of an object side surface of the fourth lens;
R8 denotes a central curvature radius of an image side surface of the fourth lens
d13 denotes an on-axis thickness of the seventh lens; and
d14 denotes an on-axis distance from an image side surface of the seventh lens to an object side surface of the eighth lens.