Patent ID: 11966022
Assignee: RAYTECH OPTICAL (CHANGZHOU) CO., LTD
Field: Optics (Instruments)
Classification: CPC G | IPC G

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

0.95≤f/TTL; 

3.50≤f2/f≤5.00;

−20.00≤(R9+R10)/(R9−R10)≤−3.50;

0.70≤f1/f≤2.15;

−8.62≤(R1+R2)/(R1−R2)≤−2.77; and

0.06≤d1/TTL≤0.20;, where TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis;
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;
R1 denotes a central curvature radius of an object-side surface of the first lens;
R2 denotes a central curvature radius of an image-side surface of the first lens;
R9 denotes a central curvature radius of an object-side surface of the fifth lens;
R10 denotes a central curvature radius of an image-side surface of the fifth lens; and
d1 denotes an on-axis thickness of the first lens.