Camera optical lens

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 refractive power;

a sixth lens having a positive refractive power; and

a seventh lens having a negative refractive power;

wherein, a total optical length of the camera optical lens is denoted as TTL, an on-axis thickness of the first lens is denoted as d 1 , a thickness parallel to the axis between edges of image side and object side effective optical surfaces of the first lens is denoted as ET 1 , an on-axis thickness of the fourth lens is denoted as d 7 , a center curvature radius of an object side surface of the fourth lens is denoted as R 7 , a center curvature radius of an image side surface of the fourth lens is denoted as R 8 , and the camera optical lens satisfies following relationships:

3.00≤ d 1 /ET 1≤5.00;

d 7 /TTL ≤0.10;

2.00 ≤R 7 /R 8≤20.00.

2 . The camera optical lens according to claim 1 , wherein an abbe number of the first lens is denoted as v 1 , and the camera optical lens satisfies a following relationship:

58. 00 ≤v 1≤82.00.

3 . The camera optical lens according to claim 1 , wherein an object side surface of the first lens is convex in a paraxial region, an image side surface of the first lens is concave in a paraxial region;

a focal length of the camera optical lens is denoted as f, a focal length of the first lens is denoted as f 1 , a center curvature radius of the object side surface of the first lens is denoted as R 1 , a center curvature radius of the image side surface of the first lens is denoted as R 2 , and the camera optical lens satisfies following relationships:

0.49 ≤f 1/ f ≤1.56;

−4.83≤(R1 +R 2)/( R 1− R 2)≤−1.31;

0.06≤ d 1 /TTL ≤0.22.

4 . The camera optical lens according to claim 3 , wherein the camera optical lens satisfies following relationships:

0.78 ≤f 1/ f ≤1.25;

−3.02≤( R 1 +R 2)/( R 1 −R 2)≤−1.63;

0.09 ≤d 1/ TTL ≤0.18.

5 . The camera optical lens according to claim 1 , wherein an object side surface of the second lens is convex in a paraxial region, an image side surface of the second lens is concave in a paraxial region;

a focal length of the camera optical lens is denoted as f, a focal length of the second lens is denoted as f 2 , a center curvature radius of the object side surface of the second lens is denoted as R 3 , a center curvature radius of the image side surface of the second lens is denoted as R 4 , an on-axis thickness of the second lens is denoted as d 3 , and the camera optical lens satisfies following relationships:

22.56 ≤f 2 /f ≤−2.41;

0.93≤( R 3+ R 4)/( R 3 −R 4)≤15.09;

0.02 ≤d 3/ TTL ≤0.08.

6 . The camera optical lens according to claim 5 , wherein the camera optical lens satisfies following relationships:

−14.10≤ f 2/ f ≤−3.01;

1.48≤( R 3+ R 4)/( R 3− R 4)≤12.07;

0.03 ≤d 3 /TTL ≤0.06.

7 . The camera optical lens according to claim 1 , wherein an object side surface of the third lens is convex in a paraxial region, an image side surface of the third lens is concave in a paraxial region;

a focal length of the camera optical lens is denoted as f, a focal length of the third lens is denoted as f 3 , a center curvature radius of the object side surface of the third lens is denoted as R 5 , a center curvature radius of the image side surface of the third lens is denoted as R 6 , an on-axis thickness of the third lens is denoted as d 5 , and the camera optical lens satisfies following relationships:

−434.56 ≤f 3 /f ≤−17.03;

4.94≤( R 5+ R 6)/( R 5− R 6)≤115.48;

0.02 ≤d 5 /TTL≤ 0.07.

8 . The camera optical lens according to claim 7 , wherein the camera optical lens satisfies following relationships:

−271.60 ≤f 3 /f ≤−21.29;

7.90≤( R 5+ R 6)/( R 5− R 6)≤92.39;

0.03 ≤d 5 /TTL ≤0.06.

9 . The camera optical lens according to claim 1 , wherein 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 focal length of the camera optical lens is denoted as f, a focal length of the fourth lens is denoted as f 4 , a center curvature radius of the object side surface of the fourth lens is denoted as R 7 , a center curvature radius of an image side surface of the fourth lens is denoted as R 8 , and the camera optical lens satisfies following relationships:

6.96 ≤f 4 /f ≤386.22;

0.55≤( R 7+ R 8)/( R 7 −R 8)≤4.23.

10 . The camera optical lens according to claim 9 , wherein the camera optical lens satisfies following relationships:

11.13 ≤f 4/ f≤ 308.97;

0.89≤( R 7+ R 8)/( R 7− R 8)≤3.38.

11 . The camera optical lens according to claim 1 , wherein an object side surface of the fifth lens is convex in a paraxial region, an image side surface of the fifth lens is concave in a paraxial region;

a focal length of the camera optical lens is denoted as f, a focal length of the fifth lens is denoted as f 5 , a center curvature radius of the object side surface of the fifth lens is denoted as R 9 , a center curvature radius of the image side surface of the fifth lens is denoted as R 10 , an on-axis thickness of the fifth lens is denoted as d 9 , and the camera optical lens satisfies following relationships:

−17.57 ≤f 5 /f ≤589.39;

1.69≤( R 9+ R 10)/( R 9− R 10)≤109.53;

0.03 ≤d 9 /TTL≤ 0.09.

12 . The camera optical lens according to claim 11 , wherein the camera optical lens satisfies following relationships:

−10.98 ≤f 5 /f ≤471.51;

2.71≤( R 9 +R 10)/( R 9− R 10)≤87.62;

0.04 ≤d 9 /TTL≤ 0.07.

13 . The camera optical lens according to claim 1 , wherein an object side surface of the sixth lens is convex in a paraxial region, an image side surface of the sixth lens is concave in a paraxial region;

a focal length of the camera optical lens is denoted as f, a focal length of the sixth lens is denoted as f 6 , a center curvature radius of the object side surface of the sixth lens is denoted as R 11 , a center curvature radius of the image side surface of the sixth lens is denoted as R 12 , an on-axis thickness of the sixth lens is denoted as d 11 , and the camera optical lens satisfies following relationships:

0.40 ≤f 6 /f ≤1.63;

−2.71≤( R 11+ R 12)/( R 11− R 12)≤−0.72;

0.03 ≤d 11 /TTL ≤0.13.

14 . The camera optical lens according to claim 13 , wherein the camera optical lens satisfies following relationships:

0.63 ≤f 6 /f ≤1.30;

−1.69≤( R 11+ R 12)/( R 11− R 12)≤−0.90;

0.05 ≤d 11 /TTL ≤0.10.

15 . The camera optical lens according to claim 1 , an object side surface of the seventh lens is concave in a paraxial region;

a focal length of the camera optical lens is denoted as f, a focal length of the seventh lens is denoted as f 7 , a center curvature radius of the object side surface of the seventh lens is denoted as R 13 , a center curvature radius of an image side surface of the seventh lens is denoted as R 14 , an on-axis thickness of the seventh lens is denoted as d 13 , and the camera optical lens satisfies following relationships:

−1.32 ≤f 7 /f ≤−0.40;

−2.24≤( R 13+ R 14)/( R 13 −R 14)≤−0.38;

0.03 ≤d 13 /TTL ≤0.10.

16 . The camera optical lens according to claim 15 , wherein the camera optical lens satisfies following relationships:

−0.82 ≤f 7 /f ≤−0.50;

−1.40≤( R 13+ R 14)/( R 13− R 14)≤−0.48;

0.05 ≤d 13 /TTL ≤0.08.

17 . The camera optical lens according to claim 1 , wherein the first lens is made of a glass material, the fourth lens is made of a glass material.

18 . The camera optical lens according to claim 1 , wherein an F number of the camera optical lens is denoted as FNO, and the camera optical lens satisfies a following relationship:

FNO≤1.82.

19 . The camera optical lens according to claim 1 , wherein a field of view of the camera optical lens in a diagonal direction is denoted as FOV, and the camera optical lens satisfies a following relationship:

FOV≥83.50°.