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; −5.00≤f2/f≤−2.50; and 2.50≤(R11+R12)/(R11−R12)≤15.00. The camera optical lens can achieve good optical performance while meeting design requirements for a large aperture, 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 having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, a fifth lens having a positive refractive power, a sixth lens having a positive refractive power, a seventh lens, and an eighth lens having a negative refractive power; wherein the camera optical lens satisfies the following conditions:
0.95≤ f/TTL;
−5.00≤ f 2/ f≤− 2.50; and
2.50≤( R 11+ R 12)/( R 11− R 12)≤15.00;
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;
R11 denotes a central curvature radius of an object-side surface of the sixth lens; and
R12 denotes a central curvature radius of an image-side surface of the sixth lens.
2. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following condition:
3.00≤ d 5/ d 6≤12.00;
where
d5 denotes an on-axis thickness of the third lens; and
d6 denotes an on-axis distance from an image-side surface of the third lens to an object-side surface of the fourth lens.
3. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
0.34≤ f 1/ f≤ 1.26;
−3.56≤( R 1+ R 2)/( R 1− R 2)≤−1.00; and
0.06≤ d 1/ TTL≤ 0.19;
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.
4. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
−0.12≤( R 3+ R 4)/( R 3− R 4)≤0.61; and
0.01≤ d 3/ 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.
5. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
0.56≤ f 3/ f≤ 2.09;
−3.49≤( R 5+ R 6)/( R 5− R 6)≤−0.47; and
0.04≤ d 5/ TTL≤ 0.13;
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.
6. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
−1.82≤ f 4/ f≤− 0.49;
0.37≤( R 7+ R 8)/( R 7− R 8)≤1.50; and
0.02≤ d 7/ TTL
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.
7. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
1.05≤ f 5/ f≤ 5.61;
−2.19≤( R 9+ R 10)/( R 9− R 10)≤−0.07; and
0.03≤ d 9/ TTL≤ 0.09;
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.
8. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
1.16≤ f 6/ f≤ 14.68; and
0.02≤ d 11/ TTL≤ 0.09;
where
f6 denotes a focal length of the sixth lens; and
d11 denotes an on-axis thickness of the sixth lens.
9. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
−102.11≤ f 7/ f≤ 3.64;
−75.04≤( R 13+ R 14)/( R 13− R 14)≤5.73; and
0.03≤ d 13/ TTL≤ 0.08;
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.
10. The camera optical lens according to claim 1 , wherein the camera optical lens further satisfies the following conditions:
−3.14≤ f 8/ f≤− 0.46;
0.23≤( R 15+ R 16)/( R 15− R 16)≤1.17; and
0.03≤ d 15/ TTL≤ 0.10;
where
f8 denotes a focal length of the eighth lens;
R15 denotes a central curvature radius of an object-side surface of the eighth lens;
R16 denotes a central curvature radius of an image-side surface of the eighth lens; and
d15 denotes an on-axis thickness of the eighth lens.