CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] | 10 Claims |
1. A camera optical lens comprising eight lenses, from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive 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 first lens includes an image-side surface being concave in the paraxial region, the fourth lens includes an object-side surface being convex in a paraxial region and an image-side surface being concave in the paraxial region; wherein the camera optical lens satisfies the following conditions:
0.95≤f/TTL;
f/IH≥2.25;
−4.00≤f2/f≤−1.80; and
3.00≤(R13+R14)/(R13−R14)≤25.00;
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;
IH denotes an image height of the camera optical lens;
f denotes a focal length of the camera optical lens;
f2 denotes a focal length of the second lens;
R13 denotes a central curvature radius of an object-side surface of the seventh lens; and
R14 denotes a central curvature radius of an image-side surface of the seventh lens.
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