Camera optical lens
The present disclosure relates to the technical field of optical lens and discloses a camera optical lens. The camera optical lens includes, 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 following conditions: 1.51≤f1/f≤2.50, 1.70≤n2≤2.20, −2.00≤f3/f4≤0.00, −10.00≤(R13+R14)/(R13−R14)≤0.00 and 1.70≤n7≤2.20, where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; f3 denotes a focal length of the third lens; f4 denotes a focal length of the fourth lens; n2 denotes a refractive index of the second lens; n7 denotes a refractive index of the seventh lens; R13 denotes a curvature radius of an object-side surface of the seventh lens; and R14 denotes a curvature radius of an image-side surface of the seventh lens.
1. A camera optical lens comprising, 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;
wherein the camera optical lens satisfies following conditions:
1.51≤ f 1/ f≤ 2.50,
1.70≤ n 2≤2.20,
−2.00≤ f 3/ f 4≤0.00;
−10.00≤( R 13+ R 14)/( R 13− R 14)≤0.00; and
1.70≤ n 7≤2.20;
where
f denotes a focal length of the camera optical lens;
f1 denotes a focal length of the first lens;
f3 denotes a focal length of the third lens;
f4 denotes a focal length of the fourth lens;
n2 denotes a refractive index of the second lens;
n7 denotes a refractive index of the seventh lens;
R13 denotes a curvature radius of an object-side surface of the seventh lens; and
R14 denotes a curvature radius of an image-side surface of the seventh lens.
2. The camera optical lens according to claim 1 further satisfying following conditions:
1.52≤ f 1/ f≤ 2.49;
1.71≤ n 2≤2.18;
−1.99≤ f 3/ f 4≤−0.03;
−9.99≤( R 13+ R 14)/( R 13− R 14)≤−0.02; and
1.71≤ n 7≤2.18.
3. The camera optical lens according to claim 1 , wherein the first lens has a positive 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; and
the camera optical lens further satisfies following conditions:
−6.52≤( R 1+ R 2)/( R 1− R 2)≤−0.98; and
0.03≤ d 1/ TTL≤ 0.12;
where
R1 denotes a curvature radius of the object-side surface of the first lens;
R2 denotes a curvature radius of the image-side surface of the first lens;
d1 denotes an on-axis thickness of the first lens; and
TTL denotes a total optical length from the object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
4. The camera optical lens according to claim 3 further satisfying following conditions:
−4.08≤( R 1+ R 2)/( R 1− R 2)≤−1.23; and
0.04≤ d 1/ TTL≤ 0.09.
5. The camera optical lens according to claim 1 , wherein the second lens has a positive refractive power, and
the camera optical lens further satisfies following conditions:
0.58≤ f 2/ f≤ 15.64;
−70.25≤( R 3+ R 4)/( R 3− R 4)≤1.52; and
0.02≤ d 3/ TTL≤ 0.07;
where
f2 denotes a focal length of the second lens;
R3 denotes a curvature radius of an object-side surface of the second lens;
R4 denotes a curvature radius of an image-side surface of the second lens;
d3 denotes an on-axis thickness of the second lens; and
TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
6. The camera optical lens according to claim 5 further satisfying following conditions:
0.93≤ f 2/ f≤ 12.51;
−43.91≤( R 3+ R 4)/( R 3− R 4)≤1.21; and
0.03≤ d 3/ TTL≤ 0.05.
7. The camera optical lens according to claim 1 , wherein the third lens has a negative refractive power, an image-side surface of the third lens is concave in a paraxial region, and
the camera optical lens further satisfies following conditions:
−3.56≤ f 3/ f≤− 0.45;
−0.14≤( R 5+ R 6)/( R 5− R 6)≤3.68; and
0.01≤ d 5/ TTL≤ 0.05;
where
R5 denotes a curvature radius of an object-side surface of the third lens;
R6 denotes a curvature radius of the image-side surface of the third lens;
d5 denotes an on-axis thickness of the third lens; and
TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
8. The camera optical lens according to claim 7 further satisfying following conditions:
−2.23≤ f 3/ f≤− 0.57;
−0.09≤( R 5+ R 6)/( R 5− R 6)≤2.94; and
0.02≤ d 5/ TTL≤ 0.04.
9. The camera optical lens according to claim 1 , wherein the fourth lens has a positive refractive power, and an object-side surface of the fourth lens is convex in a paraxial region, and
the camera optical lens further satisfies following conditions:
0.34≤ f 4/ f≤ 19.76;
−80.48≤( R 7+ R 8)/( R 7− R 8)≤0.35; and
0.03≤ d 7/ TTL≤ 0.22;
where
R7 denotes a curvature radius of the object-side surface of the fourth lens;
R8 denotes a curvature radius of an image-side surface of the fourth lens;
d7 denotes an on-axis thickness of the fourth lens; and
TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
10. The camera optical lens according to claim 9 further satisfying following conditions:
0.54≤ f 4/ f≤ 15.81;
−50.30≤( R 7+ R 8)/( R 7− R 8)≤0.28; and
0.05≤ d 7/ TTL≤ 0.18.
11. The camera optical lens according to claim 1 , wherein the fifth lens has a refractive power, an image-side surface of the fifth lens is convex in a paraxial region, and
the camera optical lens further satisfies following conditions:
−8.08≤ f 5/ f≤ 8.89;
−975.81≤( R 9+ R 10)/( R 9− R 10)≤0.63; and
0.06≤ d 9/ TTL≤ 0.25;
where
f5 denotes a focal length of the fifth lens;
R9 denotes a curvature radius of an object-side surface of the fifth lens;
R10 denotes a curvature radius of the image-side surface of the fifth lens;
d9 denotes an on-axis thickness of the fifth lens; and
TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
12. The camera optical lens according to claim 11 further satisfying following conditions:
−5.05≤ f 5/ f≤ 7.11;
−609.88≤( R 9+ R 10)/( R 9− R 10)≤0.50; and
0.10≤ d 9/ TTL≤ 0.20.
13. The camera optical lens according to claim 1 , wherein the sixth lens has a negative refractive power, an object-side surface of the sixth lens is convex in a paraxial region and an image-side surface of the sixth lens is concave in the paraxial region, and
the camera optical lens further satisfies following conditions:
−6.05≤ f 6/ f≤− 1.31;
1.26≤( R 11+ R 12)/( R 11− R 12)≤5.95; and
0.04≤ d 11/ TTL≤ 0.30;
where
f6 denotes a focal length of the sixth lens;
R11 denotes a curvature radius of the object-side surface of the sixth lens;
R12 denotes a curvature radius of the image-side surface of the sixth lens;
d11 denotes an on-axis thickness of the sixth lens; and
TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
14. The camera optical lens according to claim 13 further satisfying following conditions:
−3.78≤ f 6/ f≤− 1.64;
2.02≤( R 11+ R 12)/( R 11− R 12)≤4.76; and
0.07≤ d 11/ TTL≤ 0.24.
15. The camera optical lens according to claim 1 , wherein the seventh lens has a negative refractive power, the object-side surface of the seventh lens is concave, and
the camera optical lens further satisfies following conditions:
−11.48≤ f 7/ f≤− 0.73; and
0.03≤ d 13/ TTL≤ 0.08;
where
f7 denotes a focal length of the seventh lens;
d13 denotes an on-axis thickness of the seventh lens; and
TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.
16. The camera optical lens according to claim 15 further satisfying following condition:
−7.18≤ f 7/ f≤− 0.91; and
0.04≤ d 13/ TTL≤ 0.07.
17. The camera optical lens according to claim 1 , where a total optical length TTL from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis is less than or equal to 8.56 mm.
18. The camera optical lens according to claim 17 , wherein the total optical length TTL of the camera optical lens is less than or equal to 8.17 mm.
19. The camera optical lens according to claim 1 , wherein an F number of the camera optical lens is less than or equal to 1.96.
20. The camera optical lens according to claim 19 , wherein the F number of the camera optical lens is less than or equal to 1.92.