Camera optical lens
A camera optical lens is provided, which includes seven lenses in sequence from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The camera optical lens satisfies the following conditions: −6.50≤f5/f6≤−2.30, 0.035≤d6/TTL≤0.055, and −3.50≤R7/R8≤−1.80. f5 represents a focal length of the fifth lens, f6 represents a focal length of the sixth lens, d6 represents an on-axis distance between the third lens and the fourth lens, TTL represents a total track length of the camera optical lens, R7 represents a central curvature radius of an object-side surface of the fourth lens, and R8 represents a central curvature radius of an image-side surface of the fourth lens.
1 . A camera optical lens, comprising seven lenses in sequence from an object side to an image side: a first lens with a negative refractive power, a second lens with a negative refractive power, a third lens with a positive refractive power, a fourth lens with a positive refractive power, a fifth lens with a positive refractive power, a sixth lens with a negative refractive power, and a seventh lens with a positive refractive power;
wherein the camera optical lens satisfies the following conditions:
-
6.5
≤
f
5
/
f
6
≤
-
2.3
;
0.035
≤
d
6
/
TTL
≤
0.055
;
and
-
3.5
≤
R
7
/
R
8
≤
-
1.8
;
wherein f5 represents a focal length of the fifth lens;
f6 represents a focal length of the sixth lens;
d6 represents an on-axis distance between the third lens and the fourth lens;
TTL represents a total track length of the camera optical lens;
R 7 represents a central curvature radius of an object-side surface of the fourth lens; and
R 8 represents a central curvature radius of an image-side surface of the fourth lens.
2 . The camera optical lens of claim 1 , wherein the camera optical lens further satisfies the following condition:
0.15
≤
BFL
/
(
TTL
-
BFL
)
≤
0
.25
;
wherein BFL represents an on-axis distance from the seventh lens to an image surface.
3 . The camera optical lens of claim 1 , wherein the camera optical lens further satisfies the following condition:
1.
5
0
≤
f
7
/
f
≤
2
.50
;
wherein f7 represents a focal length of the seventh lens, and f represents a focal length of the camera optical lens.
4 . The camera optical lens of claim 1 , wherein the camera optical lens further satisfies the following condition:
35.
≤
v
5
-
v
6
≤
7
0
.00
;
wherein v5 represents an Abbe number of the fifth lens, and v6 represents an Abbe number of the sixth lens.
5 . The camera optical lens of claim 1 , wherein the camera optical lens further satisfies the following condition:
1.70≤ n 1≤2.20;
wherein n1 represents a refractive index of the first lens.
6 . The camera optical lens of claim 1 , wherein the first lens has a convex object-side surface in a paraxial region, and has a concave image-side surface in the paraxial region;
wherein the camera optical lens further satisfies the following conditions:
-
6
.
1
8
≤
f
1
/
f
≤
-
1.84
;
0.83
≤
(
R
1
+
R2
)
/
(
R
1
-
R
2
)
≤
2.99
;
and
0.02
≤
d
1
/
TTL
≤
0
.11
;
wherein f1 represents a focal length of the first lens;
f represents a focal length of the camera optical lens;
R 1 represents a central curvature radius of the object-side surface of the first lens;
R 2 represents a central curvature radius of the image-side surface of the first lens; and
d1 represent an on-axis thickness of the first lens.
7 . The camera optical lens of claim 1 , wherein the second lens has a convex object-side surface in a paraxial region, and has a concave image-side surface in the paraxial region;
wherein the camera optical lens further satisfies the following conditions:
-
6
.
6
7
≤
f
2
/
f
≤
-
1.98
;
0.53
≤
(
R
3
+
R
4
)
/
(
R
3
-
R
4
)
≤
1.9
;
and
0.003
≤
d
3
/
TTL
≤
0
.06
;
wherein f2 represents a focal length of the second lens;
f represents a focal length of the camera optical lens;
R 3 represents a central curvature radius of the object-side surface of the second lens;
R 4 represents a central curvature radius of the image-side surface of the second lens; and
d3 represents an on-axis thickness of the second lens.
8 . The camera optical lens of claim 1 , wherein the third lens has a concave object-side surface in a paraxial region, and has a convex image-side surface in the paraxial region;
wherein the camera optical lens further satisfies the following conditions:
2.66
≤
f
3
/
f
≤
8.82
;
1.05
≤
(
R
5
+
R
6
)
/
(
R
5
-
R
6
)
≤
3.65
;
and
0.09
≤
d
5
/
TTL
≤
0
.31
;
wherein f3 represents a focal length of the third lens;
f represents a focal length of the camera optical lens;
R 5 represents a central curvature radius of the object-side surface of the third lens;
R 6 represents a central curvature radius of the image-side surface of the third lens; and
d5 represents an on-axis thickness of the third lens.
9 . The camera optical lens of claim 1 , wherein the fourth lens has a convex object-side surface in a paraxial region, and has a convex image-side surface in the paraxial region;
wherein the camera optical lens further satisfies the following conditions:
1.38
≤
f
4
/
f
≤
4.36
;
and
0.03
≤
d
7
/
TTL
≤
0
.14
;
wherein f4 represents a focal length of the fourth lens;
f represents a focal length of the camera optical lens; and
d7 represents an on-axis thickness of the fourth lens.
10 . The camera optical lens of claim 1 , wherein the fifth lens has a convex object-side surface in a paraxial region, and has a convex image-side surface in the paraxial region;
wherein the camera optical lens further satisfies the following conditions:
1.87
≤
f
5
/
f
≤
17.58
;
-
0.25
≤
(
R
9
+
R
10
)
/
(
R
9
-
R
10
)
≤
0.43
;
and
0.04
≤
d
9
/
TTL
≤
0
.15
;
wherein f5 represents a focal length of the fifth lens;
f represents a focal length of the camera optical lens;
R 9 represents a central curvature radius of the object-side surface of the fifth lens;
R 10 represents a central curvature radius of the image-side surface of the fifth lens; and
d9 represents an on-axis thickness of the fifth lens.
11 . The camera optical lens of claim 1 , wherein the sixth lens has a concave object-side surface in a paraxial region, and has a concave image-side surface in the paraxial region;
wherein the camera optical lens further satisfies the following conditions:
-
3
.
6
1
≤
f
6
/
f
≤
-
0.99
;
0.18
≤
(
R
11
+
R
12
)
/
(
R
11
-
R
12
)
≤
1.24
;
and
0.02
≤
d
11
/
TTL
≤
0
.06
;
wherein f6 represents a focal length of the sixth lens;
f represents a focal length of the camera optical lens f;
R 11 represents a central curvature radius of the object-side surface of the sixth lens;
R 12 represents a central curvature radius of the image-side surface of the sixth lens; and
d11 represents an on-axis thickness d11 of the sixth lens.
12 . The camera optical lens of claim 1 , wherein the seventh lens has a convex object-side surface in a paraxial region, and has a convex image-side surface in the paraxial region;
wherein the camera optical lens further satisfies the following conditions:
-
0
.
9
8
≤
(
R
13
+
R
14
)
/
(
R
13
-
R
14
)
≤
-
0.26
;
and
0.04
≤
d
13
/
TTL
≤
0
.21
;
wherein R 13 represents a central curvature radius of the object-side surface of the seventh lens;
R 14 represents a central curvature radius of the image-side surface of the seventh lens and
d13 represents an on-axis thickness of the seventh lens.
13 . The camera optical lens of claim 1 , wherein the first lens is made of glass and the fourth lens is made of glass.