CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01)] | 18 Claims |
1. A camera optical lens, comprising:
six lenses, being sequentially from an object side to an image side, comprising:
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;
a fifth lens having a positive refractive power; and
a sixth lens having a negative refractive power;
an object side surface of the third lens is convex in a paraxial region;
wherein, a focal length of the camera optical lens is denoted as f, a focal length of the fourth lens is denoted as f4, a focal length of the fifth lens is denoted as f5, a focal length of the sixth lens is denoted as f6, a center curvature radius of an object side surface of the fifth lens is denoted as R9, a center curvature radius of an object side surface of the sixth lens is denoted as R11, a focal length of the third lens is denoted as f3, a center curvature radius of the object side surface of the third lens is denoted as R5, a center curvature radius of an image side surface of the third lens is denoted as R6, an on-axis thickness of the third lens is denoted as d5, a total optical length of the camera optical lens is denoted as TTL, and the camera optical lens satisfies following relationships:
−5.00≤f4/f≤−4.00;
−1.00≤f5/f6≤−0.50;
1.50≤R9/R11≤4.00;
1.90≤f3/f≤3.98;
−2.26≤(R5+R6)/(R5−R6)≤−0.70;
0.05≤d5/TTL≤0.12.
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