Camera optical lens
The present application relates to the field of optical lenses and discloses a camera optical lens, comprising seven lenses. The seven lenses are in order from the objective surface to the image surface: a first lens having a positive refractive force, a second lens having a negative refractive force, a third lens having a positive refractive force, a fourth lens having a negative refractive force, a fifth lens having a refractive force, a sixth lens having a positive refractive force and a seventh lens having a negative refractive force; and the following relationship expressions are satisfied: 0.95≤f 1 /f≤1.25; 60.00≤v 1 ≤82.00; −4.00≤R 13 /R 14 ≤−1.00; and 1.50≤d 4 /d 6 ≤5.00. The camera optical lens provided by the present application has excellent optical performance while satisfying the design requirements of large aperture, ultra-thinness, and ultra-wide angle.
1 . A camera optical lens, comprising seven lenses, the seven lenses being in order from an objective side to an image side: a first lens having a positive refractive force, a second lens having a negative refractive force, a third lens having a positive refractive force, a fourth lens having a negative refractive force, a fifth lens having a refractive force, a sixth lens having a positive refractive force, and a seventh lens having a negative refractive force lens;
wherein a focal length of the first lens is f 1 ; a focal length of the camera optical lens is f; an Abbe number of the first lens is v 1 ; a central radius of curvature of an objective surface of the seventh lens is R 13 ; a central radius of curvature of an image surface of the seventh lens is R 14 , an on-axis distance between the second lens and the third lens is d 4 ; an on-axis distance between the third lens and the fourth lens is d 6 , and the following relationship expressions are satisfied:
0.95
≤
f
1
/
f
≤
1.25
;
60.
≤
v
1
≤
82.
;
-
4.
≤
R
13
/
R
14
≤
-
1.
;
1.5
≤
d
4
/
d
6
≤
5.
.
2 . The camera optical lens of claim 1 , wherein a central radius of curvature of an objective surface of the fourth lens is R 7 ; a central radius of curvature of an image surface of the fourth lens is R 8 , and the following relationship expression is satisfied:
2.
≤
(
R
7
+
R
8
)
/
(
R
7
-
R
8
)
≤
20.
.
3 . The camera optical lens of claim 1 , wherein an objective surface of the first lens is convex at a proximal-axis position, and an image surface of the first lens is concave at a proximal-axis position;
a central radius of curvature of the objective surface of the first lens is R 1 , and a central radius of curvature of the image surface of the first lens is R 2 ; an on-axis thickness of the first lens is d 1 ; a total track length of the camera optical lens is TTL, and the following relationship expressions are satisfied:
-
4.14
≤
(
R
1
+
R
2
)
/
(
R
1
-
R
2
)
≤
-
1.06
;
0.06
≤
d
1
/
TTL
≤
0.21
.
4 . The camera optical lens of claim 1 , wherein an objective surface of the second lens is convex at a proximal-axis position, and an image surface of the second lens is concave at a proximal-axis position;
a focal length of the second lens is f 2 ; a central radius of curvature of the objective surface of the second lens is R 3 , and a central radius of curvature of the image surface of the second lens is R 4 ; an on-axis thickness of the second lens is d 3 ; a total track length of the camera optical lens is TTL, and the following relationship expressions are satisfied:
-
15.86
≤
f
2
/
f
≤
-
3.01
;
2.67
≤
(
R
3
+
R
4
)
/
(
R
3
-
R
4
)
≤
12.77
;
0.02
≤
d
3
/
TTL
≤
0.05
.
5 . The camera optical lens of claim 1 , wherein an image surface of the third lens is convex at a proximal-axis position;
a focal length of the third lens is f 3 ; a central radius of curvature of an objective surface of the third lens is R 5 , and a central radius of curvature of the image surface of the third lens is R 6 ; an on-axis thickness of the third lens is d 5 ; a total track length of the camera optical lens is TTL, and the following relationship expressions are satisfied:
3.47
≤
f
3
/
f
≤
24.78
;
-
0.25
≤
(
R
5
+
R
6
)
/
(
R
5
-
R
6
)
≤
1.61
;
0.03
≤
d
5
/
TTL
≤
0.12
.
6 . The camera optical lens of claim 1 , wherein an objective surface of the fourth lens is convex at a proximal-axis position, and an image surface of the fourth lens is concave at a proximal-axis position;
a focal length of the fourth lens is f 4 ; an on-axis thickness of the fourth lens is d 7 ; a total track length of the camera optical lens is TTL, and the following relationship expressions are satisfied:
-
62.59
≤
f
4
/
f
≤
-
2.51
;
0.02
≤
d
7
/
TTL
≤
0.06
.
7 . The camera optical lens of claim 1 , wherein an objective surface of the fifth lens is convex at a proximal-axis position, and an image surface of the fifth lens is concave at a proximal-axis position;
a focal length of the fifth lens is f 5 ; a central radius of curvature of the objective surface of the fifth lens is R 9 , and a central radius of curvature of the image surface of the fifth lens is R 10 ; an on-axis thickness of the fifth lens is d 9 ; a total track length of the camera optical lens is TTL, and the following relationship expressions are satisfied:
-
30.01
≤
f
5
/
f
≤
27.49
;
-
7.9
≤
(
R
9
+
R
10
)
/
(
R
9
-
R
10
)
≤
6.02
;
0.04
≤
d
9
/
TTL
≤
0.13
.
8 . The camera optical lens of claim 1 , wherein an objective surface of the sixth lens is convex at a proximal-axis position, and an image surface of the sixth lens is concave at a proximal-axis position;
a focal length of the sixth lens is f 6 ; a central radius of curvature of the objective surface of the sixth lens is R 11 , and a central radius of curvature of the image surface of the sixth lens is R 12 ; an on-axis thickness of the sixth lens is d 11 ; a total track length of the camera optical lens is TTL, and the following relationship expressions are satisfied:
0.46
≤
f
6
/
f
≤
1.71
;
-
3.58
≤
(
R
11
+
R
12
)
/
(
R
11
-
R
12
)
≤
-
1.11
;
0.04
≤
d
11
/
TTL
≤
0.13
.
9 . The camera optical lens of claim 1 , wherein the objective surface of the seventh lens is concave at a proximal-axis position, and the image surface of the seventh lens is concave at a proximal-axis position;
a focal length of the seventh lens is f 7 ; an on-axis thickness of the seventh lens is d 13 ; a total track length of the camera optical lens is TTL, and the following relationship expressions are satisfied:
-
1.41
≤
f
7
/
f
≤
-
0.43
;
0.02
≤
d
13
/
TTL
≤
0.09
.
10 . The camera optical lens of claim 1 , wherein the first lens is made of glass.