Camera optical lens

1. A camera optical lens comprising, from an object side to an image side in sequence: a first lens having a positive refractive, a second lens having a positive refractive, a third lens having a negative refractive, a fourth lens having a positive refractive with a convex object side surface and a convex image side surface, a fifth lens having a negative refractive, and a sixth lens having a positive refractive; wherein the camera optical lens further satisfies the following conditions:

0.5≤f1/f≤10;

0.81≤f4/f≤3.03;

1.25≤(R5+R6)/(R5−R6)≤2.679;

−0.08≤(R7+R8)/(R7−R8)≤0.25;

0.03≤d7/TTL≤0.13;

where

f: the focal length of the camera optical lens;

f1: the focal length of the first lens;

f4: the focal length of the fourth 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;

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;

TTL: the total optical length of the camera optical lens;

n2: the refractive index of the second lens;

n4: the refractive index of the fourth lens.

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

0.945≤f1/f≤9.0;

1.704≤n2≤2.139;

1.704≤n4≤2.139.

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

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

−25.20≤(R1+R2)/(R1−R2)≤−1.92;

0.02≤d1/TTL≤0.11; where

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

R2: the curvature radius of 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:

−15.75≤(R1+R2)/(R1−R2)≤−2.40;

0.03≤d1/TTL≤0.08.

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:

0.75≤f2/f≤3.09;

−3.73≤(R3+R4)/(R3−R4)≤−0.79;

0.05≤d3/TTL≤0.23; where

f: the focal length of the camera optical lens;

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;

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

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

1.21≤f2/f≤2.47;

−2.33≤(R3+R4)/(R3−R4)≤−0.99;

0.08≤d3/TTL≤0.18.

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

−4.51≤f3/f≤−1.07;

0.02≤d5/TTL≤−0.11; where

f: the focal length of the camera optical lens;

f3: the focal length 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:

−2.82≤f3/f≤−1.34;

2.00≤(R5+R6)/(R5−R6)≤2.679;

0.03≤d5/TTL≤0.09.

10. The camera optical lens as described in claim 1 , further satisfying the conditions:

1.30≤f4/f≤2.43;

−0.05≤(R7+R8)/(R7−R8)≤0.20; and

0.04≤d7/TTL≤0.10.

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

−6.37≤f5/f≤−1.20;

−5.51≤(R9+R10)/(R9−R10)≤−1.34;

0.03≤d9/TTL≤−0.13; where

f: the focal length of the camera optical lens;

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.

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

−3.98≤f5/f≤−1.50;

−3.45≤(R9+R10)/(R9−R10)≤−1.67;

0.04≤d9/TTL≤0.10.

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

1.66≤f6/f≤265.771;

5.99≤(R11+R12)/(R11−R12)≤40.20;

0.07≤d11/TTL-0.28; where

f: the focal length of the camera optical lens;

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.

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

2.65≤f6/f≤212.62;

9.58≤(R11+R12)/(R11−R12)≤32.16;

0.11≤d11/TTL≤0.22.

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

0.41≤f12/f≤1.95; where

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

f: the focal length of the camera optical lens.

16. The camera optical lens as described in claim 15 further satisfying the following condition:

0.66≤f12/f≤1.56.

17. The camera optical lens as described in claim 1 , wherein the total optical length TTL of the camera optical lens is less than or equal to 5.67 mm.

18. The camera optical lens as described in claim 17 , wherein the total optical length TTL of the camera optical lens is less than or equal to 5.41 mm.

19. The camera optical lens as described in claim 1 , wherein the aperture F number of the camera optical lens is less than or equal to 2.06.

20. The camera optical lens as described in claim 19 , wherein the aperture F number of the camera optical lens is less than or equal to 2.02.