Patent ID: 11966026
Assignee: RAYTECH OPTICAL (CHANGZHOU) CO., LTD
Field: Optics (Instruments)
Classification: CPC G | IPC G

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

−1.80≤f1/f≤−0.60; 2.00≤d5/d6≤8.00; 3.50≤f6/f≤6.00; 0.20≤R7/R8≤3.50;

where
f denotes a focal length of the camera optical lens;
f1 denotes a focal length of the first lens;
f6 denotes a focal length of the sixth lens;
d5 denotes an on-axis thickness of the third lens;
d6 denotes an on-axis distance from an image-side surface of the third lens to an object-side surface of the fourth 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.