Camera optical lens
Disclosed is a camera optical lens including nine lenses, the nine lenses from an object side to an image side being: a first lens with a negative refractive power, a second lens with a positive refractive power, a third lens with a positive refractive power, a fourth lens with a negative refractive power, a fifth lens with a negative refractive power, a sixth lens with a positive refractive power, a seventh lens with a negative refractive power, an eighth lens with a positive refractive power and an ninth lens with a negative refractive power. The camera optical lens satisfies: −4.50≤f1/f≤−2.00; 5.50≤d5/d6≤32.00. The camera optical lens has good optical performance, and meets the design requirements of large apertures, wide-angle and ultra-thin.
1. A camera optical lens, comprising nine lenses, the nine lenses from an object side to an image side being:
a first lens having a negative refractive power;
a second lens having a positive refractive power;
a third lens having a positive refractive power;
a fourth lens with a negative refractive power;
a fifth lens with a negative refractive power;
a sixth lens with a positive refractive power;
a seventh lens with a negative refractive power;
an eighth lens with a positive refractive power; and
an ninth lens with a negative refractive power;
wherein the camera optical lens satisfies the following conditions:
−4.50≤ f 1/ f≤− 2.00; 5.50≤ d 5/ d 6≤32.00; 0.44≤ f 3/ f≤ 1.68; −1.03≤( R 5+ R 6)/( R 5− R 6)≤−0.08; 0.04≤ d 5/TTL≤0.15;
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;
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;
d5 denotes an on-axis thickness of the third lens;
d6 denotes an on-axis distance from an image-side surface of the third lens to an object-side surface of the fourth lens;
TTL denotes a total track length of the camera optical lens.
2. The camera optical lens according to claim 1 , further satisfying the following conditions:
−9.00≤ f 4/ f≤− 2.00;
where f4 denotes a focal length of the fourth lens.
3. The camera optical lens according to claim 1 , further satisfying the following conditions:
0.46≤( R 1+ R 2)/( R 1− R 2)≤1.89; 0.01≤ d 1/TTL≤0.03;
where
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;
d1 denotes an on-axis thickness of the first lens.
4. The camera optical lens according to claim 1 , further satisfying the following conditions:
1.05≤ f 2/ f≤ 5.50; −13.16≤( R 3+ R 4)/( R 3− R 4)≤−2.56; 0.01≤ d 3/TTL≤0.04;
where
f2 denotes a focal length of the second lens;
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;
d3 denotes an on-axis thickness of the second lens.
5. The camera optical lens according to claim 1 , further satisfying the following conditions:
0.97≤( R 7+ R 8)/( R 7− R 8)≤16.17; 0.01≤ d 7/TTL≤0.08;
where
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;
d7 denotes an on-axis thickness of the fourth lens.
6. The camera optical lens according to claim 1 , further satisfying the following conditions:
−46.83≤ f 5/ f≤− 15.20; 3.74≤( R 9+ R 10)/( R 9− R 10)≤11.51; 0.01≤ d 9/TTL≤0.05;
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;
d9 denotes an on-axis thickness of the fifth lens.
7. The camera optical lens according to claim 1 , further satisfying the following conditions:
6.36≤ f 6/ f≤ 22.69; 1.85≤( R 11+ R 12)/( R 11− R 12)≤6.47; 0.04≤ d 11/TTL≤0.15;
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;
d11 denotes an on-axis thickness of the sixth lens.
8. The camera optical lens according to claim 1 , further satisfying the following conditions:
−3.85≤ f 7/ f≤− 0.95; 0.13≤( R 13+ R 14)/( R 13− R 14)≤0.54; 0.02≤ d 13/TTL≤0.12;
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;
d13 denotes an on-axis thickness of the seventh lens.
9. The camera optical lens according to claim 1 , further satisfying the following conditions:
0.40≤ f 8/ f≤ 1.34; −5.16≤( R 15+ R 16)/( R 15− R 16)≤−1.49; 0.04≤ d 15/TTL≤0.19;
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;
d15 denotes an on-axis thickness of the eighth lens.
10. The camera optical lens according to claim 1 , further satisfying the following conditions:
−1.65≤ f 9/ f≤− 0.53; −0.82≤( R 17+ R 18)/( R 17− R 18)≤−0.26; 0.03≤ d 17/TTL≤0.12;
where
f9 denotes a focal length of the ninth lens;
R17 denotes a central curvature radius of an object-side surface of the ninth lens;
R18 denotes a central curvature radius of an image-side surface of the ninth lens;
d17 denotes an on-axis thickness of the ninth lens.