Camera optical lens comprising six lenses of −+++−− refractive powers

1. A camera optical lens comprising, from an object side to an image side in sequence: a first lens, a second lens having a positive refractive power, a third lens having a positive refractive power, a fourth lens, a fifth lens and a sixth lens; wherein an aperture F number of the camera optical lens is less than or equal to 2.12; wherein the camera optical lens further satisfies the following conditions:

−3≤f1/f≤−1;

v3≥60;

1.7≤n6≤2.2;

0.03≤d3/TTL≤0.058;

where

f: the focal length of the camera optical lens;

f1: the focal length of the first lens;

v3: the abbe number of the third lens;

f7: the focal length of the seventh lens;

n6: the refractive index of the sixth lens;

d3: the thickness on-axis of the second lens;

TTL: the total distance from the object side surface of the first lens to the image plane along the optic axis.

2. The camera optical lens as described in claim 1 , wherein the first lens is made of plastic material, the second lens is made of plastic material, the third lens is made of glass material, the fourth lens is made of plastic material, the fifth lens is made of plastic material, the sixth lens is made of glass material.

3. The camera optical lens as described in claim 1 further satisfying the following conditions:

−2.97≤f1/f≤−1.25;

v3≥61.667;

1.707≤n6≤2.002;

0.04≤d3/TTL≤0.058.

4. The camera optical lens as described in claim 1 , wherein first lens has a negative refractive power with a convex object side surface and a concave image side surface; the camera optical lens further satisfies the following conditions:

2.22≤(R1+R2)/(R1−R2)≤12.11;

0.02≤d1/TTL≤0.07;

where

R1: the curvature radius of the object side surface of the first lens;

R2: the curvature radius of the image side surface of the first lens;

d1: the thickness on-axis of the first lens.

5. The camera optical lens as described in claim 4 further satisfying the following conditions:

3.55≤(R1+R2)/(R1−R2)≤9.68;

0.04≤d1/TTL≤0.06.

6. The camera optical lens as described in claim 1 , wherein the second lens has a convex object side surface and a concave image side surface; the camera optical lens further satisfies the following conditions:

0.78≤f2/f≤3.41;

− 8 . 17 ≤(R3+R4)/(R3−R4)≤−1.89;

Where:

f2: the focal length of the second lens;

R3: the curvature radius of the object side surface of the second lens;

R4: the curvature radius of the image side surface of the second lens.

7. The camera optical lens as described in claim 6 further satisfying the following condition:

1.25≤f2/f≤2.73;

−5.10≤(R3+R4)/(R3−R4)≤−2.36.

8. The camera optical lens as described in claim 1 , wherein the third lens has a convex object side surface and a convex image side surface; wherein the camera optical lens further satisfies the following conditions:

0.43≤f3/f≤1.60;

−1.84≤(R5+R6)/(R5−R6)≤−0.60;

0.05≤d5/TTL≤0.18; where

f3: the focal length of the third lens;

R5: the curvature radius of the object side surface of the third lens;

R6: the curvature radius of the image side surface of the third lens;

d5: the thickness on-axis of the third lens.

9. The camera optical lens as described in claim 8 further satisfying the following conditions:

0.69≤f3/f≤1.28;

−1.15≤(R5+R6)/(R5−R6)≤−0.75;

0.08≤d5/TTL≤0.15.

10. The camera optical lens as described in claim 1 , wherein the fourth lens has a positive refractive power with a concave object side surface and a convex image side surface; the camera optical lens further satisfies the following conditions:

1.18≤f4/f≤3.68;

0.97≤(R7+R8)/(R7−R8)≤3.70;

0.03≤d7/TTL≤0.14; where

f4: the focal length of the fourth lens;

R7: the curvature radius of the object side surface of the fourth lens;

R8: the curvature radius of the image side surface of the fourth lens;

d7: the thickness on-axis of the fourth lens.

11. The camera optical lens as described in claim 10 further satisfying the following conditions:

1.89≤f4/f≤2.94;

1.56≤(R7+R8)/(R7−R8)≤2.96;

0.05≤d7/TTL≤0.11.

12. The camera optical lens as described in claim 1 , wherein the fifth lens has a negative refractive power with a concave object side surface and a convex image side surface; the camera optical lens further satisfies the following conditions:

−11.93≤f5/f≤−1.46;

−24.09≤(R9+R10)/(R9−R10)≤−4.78;

0.02≤d9/TTL≤0.08; where

f5: the focal length of the fifth lens;

R9: the curvature radius of the object side surface of the fifth lens;

R10: the curvature radius of the image side surface of the fifth lens;

d9: the thickness on-axis of the fifth lens.

13. The camera optical lens as described in claim 12 further satisfying the following conditions:

−7.45≤f5/f≤−1.82;

− 15 . 05 ≤(R9+R10)/(R9−R10)≤−5.98;

0.04≤d9/TTL≤0.06.

14. The camera optical lens as described in claim 1 , wherein the sixth lens has a negative refractive power with a convex object side surface and a concave image side surface; the camera optical lens further satisfies the following conditions:

−7.98≤f6/f≤−1.01;

1.75≤(R11+R12)/(R11−R12)≤8.01;

0.08≤d11/TTL≤0.29; where

f6: the focal length of the sixth lens;

R11: the curvature radius of the object side surface of the sixth lens;

R12: the curvature radius of the image side surface of the sixth lens;

d11: the thickness on-axis of the sixth lens.

15. The camera optical lens as described in claim 14 further satisfying the following conditions:

−4.99≤f6/f≤−1.27;

2.79≤(R11+R12)/(R11−R12)≤6.41;

0.13≤d11/TTL≤0.23.

16. The camera optical lens as described in claim 1 further satisfying the following condition:

−28.25≤f12/f≤27.13; where

f12: the combined focal length of the first lens and the second lens.

17. The camera optical lens as described in claim 16 further satisfying the following condition:

−17.66≤f12/f≤21.71.

18. The camera optical lens as described in claim 1 , wherein the total distance from the object side surface of the first lens to the image plane along the optic axis TTL of the camera optical lens is less than or equal to 5.17 mm.