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 positive refractive power; and
a fifth lens having a negative refractive power,
wherein at least one of the first lens to the fifth lens has a free-form surface, and the camera optical lens satisfies following conditions:
−3.50≤f2/f≤−1.50;
−2.00≤(R5+R6)/(R5−R6)≤0.20;
1.00≤f4/f≤5.50,
−5.62≤(R3+R4)/(R3−R4)≤−0.75; and
0.02≤d3/TTL≤0.08,
where f denotes a focal length of the camera optical lens, f2 denotes a focal length of the second lens, f4 denotes a focal length of the fourth 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, R3 denotes a central curvature radius of an object side surface of the second lens, R4 denotes a central curvature radius of an image side surface of the second lens, d3 denotes an on-axis thickness of the second 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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