	US 12,259,528 B2
	Camera optical lens
Koji Nitta, Osaka (JP); and Yang Zhang, Shenzhen (CN)
Assigned to AAC Optics (Suzhou) Co., Ltd., Suzhou (CN)
Filed by AAC Optics (Suzhou) Co., Ltd., Suzhou (CN)
Filed on Dec. 14, 2021, as Appl. No. 17/549,904.
Claims priority of application No. 202011541942.2 (CN), filed on Dec. 24, 2020.
Prior Publication US 2022/0206269 A1, Jun. 30, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01)

CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)]

19 Claims

1. A camera optical lens, comprising:

seven 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 negative refractive power;

a fourth lens having a positive refractive power;

a fifth lens having a negative refractive power; an object side surface of the fifth lens is concave in a paraxial region;

a sixth lens having a positive refractive power; and

a seventh lens having a negative refractive power;

wherein, a center curvature radius of an image side surface of the first lens is denoted as R2, a center curvature radius of an object side surface of the second lens is denoted as R3, a center curvature radius of an object side surface of the sixth lens is denoted as R11, a center curvature radius of an image side surface of the sixth lens is denoted as R12, a center curvature radius of an object side surface of the seventh lens is denoted as R13, a center curvature radius of an image side surface of the seventh lens is denoted as R14, an on-axis distance, from the image side surface of the first lens to the object side surface of the second lens, is denoted as d2, 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 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 fifth lens is denoted as f5, a center curvature radius of the object side surface of the fifth lens is denoted as R9, a center curvature radius of an image side surface of the fifth lens is denoted as R10, an on-axis thickness of the fifth lens is denoted as d9, a total optical length of the camera optical lens is denoted as TTL, and the camera optical lens satisfies following relationships:

0.20

R2/R3

1.00;

−0.09

(R13+R14)/(R13−R14) custom character

0.79;

0.25

(d2+d6)/d4 custom character

0.50;

1.00

R12/R11

2.00;