Camera optical lens
The present disclosure relates to optical lens, and provides a camera optical lens including from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; wherein the camera optical lens satisfies the following conditions: 0.95≤f/TTL; −4.00≤f2/f≤−1.90; and 0.25≤(R15+R16)/(R15−R16)≤0.90. The camera optical lens can achieve good optical performance while meeting design requirements for a long focal length and ultra-thinness.
1. A camera optical lens comprising from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; wherein the camera optical lens satisfies the following conditions:
0.95≤f/TTL;
−4.00≤f2/f≤−1.90;
1.50≤d10/d11≤3.00; and
0.25≤(R15+R16/(R15−R16)0.90;
where
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;
f denotes a focal length of the camera optical lens;
f2 denotes a focal length of the second lens;
d10 denotes on-axis distance from the image-side surface of the fifth lens to the object-side surface of the sixth lens,
d11 denotes an on-axis thickness of the sixth lens,
R15 denotes a central curvature radius of an object-side surface of the eighth lens; and
R16 denotes a central curvature radius of an image-side surface of the eighth lens.
2. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
0.46≤f1/f1.51;
−3.28≤(R1+R2)/(R1−R2)≤−1.05; and
0.03≤d1/TTL≤0.11;
where
f1 denotes a focal length of the first lens;
R1 denotes a central curvature radius of an object-side surface of the first lens;
R2 denotes a central curvature radius of an image-side surface of the first lens; and
d1 denotes an on-axis thickness of the first lens.
3. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
1.77≤(R3+R4)/(R3−R4)≤14.98; and
0.01≤d3/TTL≤0.05;
where
R3 denotes a central curvature radius of an object-side surface of the second lens;
R4 denotes a central curvature radius of an image-side surface of the second lens; and
d3 denotes an on-axis thickness of the second lens.
4. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
0.57≤f3/f≤1.86;
−3.79≤(R5+R6)/(R5−R6)≤−0.95; and
0.05≤d5/TTL≤0.15;
where
f3 denotes a focal length of the third lens;
R5 denotes a central curvature radius of an object-side surface of the third lens;
R6 denotes a central curvature radius of an image-side surface of the third lens; and
d5 denotes an on-axis thickness of the third lens.
5. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
−2.98≤f4/f≤−0.52;
−2.18 (R7+R8)/(R7−R8)≤−0.31; and
0.01≤d7/TTL≤0.15;
where
f4 denotes a focal length of the fourth lens;
R7 denotes a central curvature radius of an object-side surface of the fourth lens;
R8 denotes a central curvature radius of an image-side surface of the fourth lens; and
d7 denotes an on-axis thickness of the fourth lens.
6. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
0.73≤f5/f≤8.19;
−46.43≤(R9+R10)/(R9−R10)≤−1.64; and
0.02≤d9/TTL≤0.08;
where
f5 denotes a focal length of the fifth lens;
R9 denotes a central curvature radius of an object-side surface of the fifth lens;
R10 denotes a central curvature radius of an image-side surface of the fifth lens; and
d9 denotes an on-axis thickness of the fifth lens.
7. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
−287.10≤f6/f≤37.43;
−140.11≤(R11+R12)/(R11−R12)≤−41.33; and
0.02≤d11/TTL≤0.08;
where
f6 denotes a focal length of the sixth lens;
R11 denotes a central curvature radius of an object-side surface of the sixth lens;
R12 denotes a central curvature radius of an image-side surface of the sixth lens; and
d11 denotes an on-axis thickness of the sixth lens.
8. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
0.77≤f7/f≤4.87;
1.44≤(R13+R14)/(R13−R14)≤8.15; and
0.03≤d13/TTL≤0.15;
where
f7 denotes a focal length of the seventh lens;
R13 denotes a central curvature radius of an object-side surface of the seventh lens;
R14 denotes a central curvature radius of an image-side surface of the seventh lens; and
d13 denotes an on-axis thickness of the seventh lens.
9. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
−1.78≤f8/f≤−0.41; and
0.02≤d15/TTL≤0.10;
where
f8 denotes a focal length of the eighth lens; and
d15 denotes an on-axis thickness of the eighth lens.