CPC G02B 9/60 (2013.01) [G02B 13/18 (2013.01)] | 9 Claims |
1. A camera optical lens, comprising, from an object side to an image side:
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 negative refractive power; and
a fifth lens,
wherein at least one of the first lens to the fifth lens has a free-form surface,
wherein the camera optical lens satisfies following conditions:
−3.50≤f4/f≤−0.35;
−8.0≤R10/f≤−1.00;
2.00≤d8/d7≤8.0;
0.52≤(R7+R8)/(R7−R8)≤6.56; and
0.02≤d7/TTL≤0.10,
where
f denotes a focal length of the camera optical lens;
f4 denotes a focal length of the fourth lens;
R10 denotes a central curvature radius of an image side surface of the fifth lens;
d7 denotes an on-axis thickness of the fourth lens;
d8 denotes an on-axis distance from an image side surface of the fourth lens to an object side surface of the fifth lens;
R7 denotes a central curvature radius of an object side surface of the fourth lens;
R7 denotes a central curvature radius of the image side surface of the fourth lens; and
TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
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