Camera optical lens
Provided is a camera optical lens including first to fourth lenses. The camera optical lens satisfies: 0.10≤R1/R2≤0.20; 1.10≤R3/R4≤1.50; 5.50≤R5/R6≤6.50; and −6.50≤f2/f≤−4.50, where f denotes a focal length of the camera optical lens; f2 denotes a focal length of the second lens; R1 denotes a curvature radius of an object side surface of the first lens; R2 denotes a curvature radius of an image side surface of the first 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; R5 denotes a curvature radius of an object side surface of the third lens; and R6 denotes a curvature radius of an image side surface of the third lens. The camera optical lens has good optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.
1. A camera optical lens, comprising, from an object side to an image side:
a first lens having a positive refractive power;
a second lens having a negative refractive power;
a third lens having a positive refractive power; and
a fourth lens having a negative refractive power,
wherein the camera optical lens satisfies following conditions:
0.10≤ R 1/ R 2≤0.20;
1.10≤ R 3/ R 4≤1.50;
5.50≤ R 5/ R 6≤6.50; and
−6.50≤ f 2/ f≤− 4.50,
where
f denotes a focal length of the camera optical lens;
f2 denotes a focal length of the second lens;
R1 denotes a curvature radius of an object side surface of the first lens;
R2 denotes a curvature radius of an image side surface of the first 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;
R5 denotes a curvature radius of an object side surface of the third lens; and
R6 denotes a curvature radius of an image side surface of the third lens.
2. The camera optical lens as described in claim 1 , further satisfying a following condition:
5.50≤ d 1/ d 2≤7.50,
where
d1 denotes an on-axis thickness of the first lens; and
d2 denotes an on-axis distance from the image side surface of the first lens to the object side surface of the second lens.
3. The camera optical lens as described in claim 1 , further satisfying following conditions:
0.53≤ f 1/ f≤ 1.81;
−3.00≤( R 1+ R 2)/( R 1− R 2)≤−0.82; and
0.07≤ d 1/ TTL≤ 0.26,
where
f1 denotes a focal length 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 plane of the camera optical lens along an optic axis.
4. The camera optical lens as described in claim 1 , further satisfying following conditions:
2.52≤( R 3+ R 4)/( R 3− R 4)≤17.98; and
0.03≤ d 3/ TTL≤ 0.12,
where
d3 denotes an on-axis thickness of the second lens; and
TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
5. The camera optical lens as described in claim 1 , further satisfying following conditions:
0.22≤ f 3/ f≤ 0.75;
0.68≤( R 5+ R 6)/( R 5− R 6)≤2.17; and
0.12≤ d 5/ TTL≤ 0.39,
where
f3 denotes a focal length of the third lens;
d5 denotes an on-axis thickness of the third lens; and
TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
6. The camera optical lens as described in claim 1 , further satisfying following conditions:
−0.94≤ f 4/ f≤− 0.26;
0.50≤( R 7+ R 8)/( R 7− R 8)≤1.87; and
0.05≤ d 7/ TTL≤ 0.15,
where
f4 denotes a focal length of the fourth lens;
R7 denotes a curvature radius of an 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 the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
7. The camera optical lens as described in claim 1 , further satisfying a following condition:
TTL/IH≤ 1.86,
where
TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis; and
IH denotes an image height of the camera optical lens.
8. The camera optical lens as described in claim 1 , further satisfying a following condition:
FNO≤ 2.40,
where
FNO denotes an F number of the camera optical lens.
9. The camera optical lens as described in claim 1 , further satisfying a following condition:
FOV≥ 67°,
where
FOV denotes a field of view of the camera optical lens.
10. The camera optical lens as described in claim 1 , further satisfying a following condition:
0.60≤ f 12/ f≤ 1.97,
where
f12 denotes a combined focal length of the first lens and the second lens.