CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); G02B 27/0025 (2013.01)] | 9 Claims |
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 negative 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;
3.00≤f2/f≤4.50;
1.90≤d5/d4≤3.00, and
0.20≤(R5+R6)/(R5−R6)≤0.90;
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;
f2 denotes a focal length of the second lens;
R5 denotes a central curvature radius of an object-side surface of the third lens;
R6 denotes a central curvature radius of an image-side surface of the third lens;
d4 denotes an on-axis distance from an image-side surface of the second lens to the object-side surface of the third lens; and
d5 denotes an on-axis thickness of the third lens.
|