| CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01); G02B 13/0015 (2013.01); G02B 13/06 (2013.01)] | 18 Claims |
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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; an object side surface of the fourth lens is concave in a paraxial region, an image side surface of the fourth lens is convex in a paraxial region;
a fifth lens having a positive refractive power; and
a sixth lens having a negative refractive power;
wherein, a focal length of the camera optical lens is denoted as f, a focal length of the second lens is denoted as f2, a center curvature radius of an 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 first lens is denoted as d1, an on-axis distance, from an image side surface of the first lens to an object side surface of the second lens, is denoted as d2, an on-axis thickness of the second lens is denoted as d3, a focal length of the fourth lens is denoted as f4, a center curvature radius of the object side surface of the fourth lens is denoted as R7, a center curvature radius of the image side surface of the fourth lens is denoted as R8, an on-axis thickness of the fourth lens is denoted as d7, a total optical length of the camera optical lens is denoted as TTL, total number of lenses in the camera optical lens with refractive power is six, and the camera optical lens satisfies following relationships:
4.00≤(d1+d2)/d3≤5.50;
−3.00≤f2/f≤−2.00;
0.20≤R5/R6≤0.35;
−5.62≤f4/f≤−1.49;
−10.47≤(R7+R8)/(R7−R8)≤−1.86;
0.04≤d7/TTL≤0.08.
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