| CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01); G02B 13/06 (2013.01)] | 19 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 negative refractive power;
a second lens having a positive refractive power;
a third lens having a positive refractive power;
a fourth lens having a negative refractive power; an image side surface of the fourth lens is concave 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 second lens is denoted as f2, a focal length of the third lens is denoted as f3, an on-axis thickness of the first lens is denoted as d1, an on-axis thickness of the second lens is denoted as d3, an on-axis distance, from an image side surface of the second lens to an object side surface of the third lens, is denoted as d4, an on-axis thickness of the third lens is denoted as d5, an on-axis distance, from an image side surface of the third lens to an object side surface of the fourth lens, is denoted as d6, a focal length of the camera optical lens is denoted as f, 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, and the camera optical lens satisfies following relationships:
0.80≤d4/d6≤1.10;
2.00≤f2/f3≤3.50;
1.10≤(d1+d3)/d5≤1.35;
−6.90≤f4/f≤−1.85;
−1.41≤(R7+R8)/(R7−R8)≤2.06;
0.02≤d7/TTL≤0.07.
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