Camera optical lens
The present disclosure relates to the field of optical lenses, and discloses a camera optical lens sequentially including seven lenses from an object-side to an image-side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power; and the following relational expressions are satisfied: −18.000≤f1/f+f2/f+f3/f≤−8.000; −1.800≤f4/f+f5/f+f6/f+f7/f≤−0.600; −0.080≤d0/d1≤−0.050. The camera optical lens according to the present disclosure has excellent optical performance, has the characteristics of miniaturization, wide-angle, and sufficient correction of aberration, and is particularly suitable for a mobile phone camera lens component, a web camera lens, and a vehicle-mounted lens composed of camera elements such as CCD, CMOS with high definition.
1 . A camera optical lens, comprising an aperture stop and seven lenses from an object-side to an image-side sequentially comprising:
a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power;
wherein an object-side surface of the first lens is convex in a paraxial region, and an image-side surface of the first lens is concave in the paraxial region; an object-side surface of the second lens is convex in a paraxial region, and an image-side surface of the second lens is concave in the paraxial region; an object-side surface of the third lens is concave in a paraxial region, and an image-side surface of the third lens is concave in the paraxial region; an object-side surface of the fourth lens is convex in a paraxial region; an object-side surface of the fifth lens is convex in the paraxial region, and an image-side surface of the fifth lens is concave in the paraxial region; an object-side surface of the sixth lens is convex in the paraxial region, and an image-side surface of the sixth lens is convex in the paraxial region; an object-side surface of the seventh lens is convex in the paraxial region, and an image-side surface of the seventh lens is concave in the paraxial region;
wherein, a focal length of the camera optical lens is f, a focal length of the first lens is f1, a focal length of the second lens is f2, a focal length of the third lens is f3, a focal length of the fourth lens is f4, a focal length of the fifth lens is f5, a focal length of the sixth lens is f6, a focal length of the seventh lens is f7, an on-axis distance from the aperture stop to the object-side surface of the first lens is do, an on-axis thickness of the first lens is d1, a central curvature radius of the object-side surface of the fifth lens in the paraxial region is R9, a central curvature radius of the image-side surface of the fifth lens in the paraxial region is R10, a central curvature radius of the image-side surface of the sixth lens in the paraxial region is R12, a central curvature radius of the object-side surface of the seventh lens in the paraxial region is R13, a central curvature radius of the image-side surface of the seventh lens in the paraxial region is R14, and following relational expressions are satisfied:
-
18.
≤
f
1
/
f
+
f
2
/
f
+
f
3
/
f
≤
-
8.
;
-
1.8
≤
f
4
/
f
+
f
5
/
f
+
f
6
/
f
+
f
7
/
f
≤
-
0
.
6
00
;
-
0.08
≤
d
0
/
d
1
≤
-
0
.
0
50
;
-
8.
≤
R
12
/
f
6
≤
-
2
.
5
00
;
-
1.
≤
f
4
/
f
5
≤
-
0
.
5
00
;
1.7
≤
(
R
9
+
R
10
)
/
f
≤
2
.
6
00
;
and
2.
≤
R
13
/
R
14
≤
6
.
0
0
0
.
2 . The camera optical lens as described in claim 1 , wherein a following relational expression is satisfied: −15.000≤f1/f+f2/f+f3/f≤−9.000.
3 . The camera optical lens as described in claim 1 , wherein a following relational expression is satisfied: −1.500≤f4/f+f5/f+f6/f+f7/f≤−0.700.
4 . The camera optical lens as described in claim 1 , wherein
an on-axis distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens is d8, a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optic axis of the camera optical lens is TTL, where: 0.065≤d8/TTL≤0.120.
5 . The camera optical lens as described in claim 1 , wherein the first lens is made of glass.
6 . A camera optical lens, comprising an aperture stop and seven lenses from an object-side to an image-side sequentially comprising: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power;
an object-side surface of the first lens is convex in a paraxial region, and an image-side surface of the first lens is concave in the paraxial region; an object-side surface of the second lens is convex in a paraxial region, and an image-side surface of the second lens is concave in the paraxial region; an object-side surface of the third lens is concave in a paraxial region, and an image-side surface of the third lens is concave in the paraxial region; an object-side surface of the fourth lens is convex in a paraxial region; an object-side surface of the fifth lens is convex in a paraxial region, and an image-side surface of the fifth lens is concave in the paraxial region; an object-side surface of the sixth lens is convex in a paraxial region, and an image-side surface of the sixth lens is convex in the paraxial region; an object-side surface of the seventh lens is convex in the paraxial region, and an image-side surface of the seventh lens is concave in the paraxial region;
wherein a focal length of the camera optical lens is f, a focal length of the first lens is f1, a focal length of the second lens is f2, a focal length of the third lens is f3, a focal length of the fourth lens is f4, a focal length of the fifth lens is f5, a focal length of the sixth lens is f6, a focal length of the seventh lens is f7, an on-axis distance from the aperture stop to the object-side surface of the first lens is do, an on-axis thickness of the first lens is d1, a central curvature radius of the object-side surface of the first lens in the paraxial region is R1, a central curvature radius of the image-side surface of the first lens in the paraxial region is R2, a central curvature radius of the object-side surface of the seventh lens in the paraxial region is R13, a central curvature radius of the image-side surface of the seventh lens in the paraxial region is R14, a sum of the on-axis thicknesses of the first lens to the seventh lens is Σd, a sum of the lengths of the air gaps between any two adjacent lenses between the first lens to the seventh lens on the optical axis is ΣD, and following relational expressions are satisfied:
-
18.
≤
f
1
/
f
+
f
2
/
f
+
f
3
/
f
≤
-
8.
;
-
1.8
≤
f
4
/
f
+
f
5
/
f
+
f
6
/
f
+
f
7
/
f
≤
-
0
.
6
00
;
-
0.08
≤
d
0
/
d
1
≤
-
0
.
0
50
;
2.6
≤
f
1
/
R
1
+
f
1
/
R
2
≤
4
.
8
00
;
0.6
≤
(
R
13
+
R
14
)
/
f
≤
2
.
6
00
;
and
0.6
≤
∑
D
/
∑
d
≤
0
.
9
5
0
.
7 . The camera optical lens as described in claim 6 , wherein a following relational expression is satisfied: −15.000≤f1/f+f2/f+f3/f≤−9.000.
8 . The camera optical lens as described in claim 6 , wherein a following relational expression is satisfied: −1.500≤f4/f+f5/f+f6/f+f7/f≤−0.700.
9 . The camera optical lens as described in claim 6 , wherein a following relational expression is satisfied: 3.400≤f1/R1+f1/R2≤4.000.
10 . The camera optical lens as described in claim 6 , wherein a following relational expression is satisfied: 0.700≤(R13+R14)/f≤2.200.
11 . The camera optical lens as described in claim 6 , wherein a following relational expression is satisfied: 0.630≤ΣD/Σd≤0.920.
12 . The camera optical lens as described in claim 6 , wherein
a combined focal length of the first lens and the second lens is f12, a central curvature radius of the image-side surface of the second lens in the paraxial region is R4, and a following relational expression is satisfied: −3.000≤f12/(R1−R4)≤−1.300.
13 . The camera optical lens as described in claim 12 , wherein a following relational expression is satisfied: −2.600≤f12/(R1−R4)≤−1.500.
14 . The camera optical lens as described in claim 6 , wherein a following relational expression is satisfied: 0.007≤d0/(R1−R2)≤0.020.
15 . The camera optical lens as described in claim 14 , wherein a following relational expression is satisfied: 0.008≤d0/(R1−R2)≤0.018.
16 . The camera optical lens as described in claim 6 , wherein the first lens is made of glass.