US 12,222,470 B2
Camera optical lens
Takayuki Sakaguchi, Osaka (JP); and Yuanshan Cui, Shenzhen (CN)
Assigned to AAC Optics (Suzhou) Co., Ltd., Suzhou (CN)
Filed by AAC Optics (Suzhou) Co., Ltd., Suzhou (CN)
Filed on Nov. 25, 2021, as Appl. No. 17/535,650.
Claims priority of application No. 202011462313.0 (CN), filed on Dec. 14, 2020.
Prior Publication US 2022/0196984 A1, Jun. 23, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 9/62 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01)] 18 Claims
OG exemplary drawing
 
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.