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 power with a convex object side surface and a concave image side surface, a second lens having a positive refractive power with a convex object side surface and a concave image side surface, a third lens having a negative refractive power with a convex object side surface and a concave image side surface, a fourth lens having a positive refractive power with a convex object side surface and a convex image side surface, a fifth lens having a negative refractive power with a concave object side surface and a convex image side surface, and a sixth lens having a positive refractive power with a convex object side surface and a concave image side surface; wherein the camera optical lens further satisfies the following conditions:

0.1≤ f 1/ f≤ 10;

1.7≤ n 4≤2.2;

0.01≤ d 7/ TTL≤ 0.2;

0.72≤ f 4/ f≤ 2.73 ;

where

f: the focal length of the camera optical lens;

f1: the focal length of the first lens;

f3: a focal length of the third lens;

f4: a focal length of the fourth lens;

n4: the refractive power of the forth lens;

d7: the thickness on-axis of the forth lens; and

TTL: a total optical length from the object side surface of the first lens to the image surface along the optic axis of the camera optical lens.

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 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.

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

0.733≤ f 1/ f≤ 6.478;

1.726≤ n 4≤2.19;

0.035≤ d 7/ TTL≤ 0.169.

4. The camera optical lens as described in claim 1 , wherein the camera optical lens further satisfies the following conditions:

−8.38≤( R 1+ R 2)/( R 1− R 2)≤−1.88;

0.15 mm≤ d 1≤0.59 mm; 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: a thickness on-axis of the first lens.

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

−5.23≤( R 1+ R 2)/( R 1− R 2)≤−2.35;

0.23 mm≤ d 1≤0.48 mm.

6. The camera optical lens as described in claim 1 , wherein the camera optical lens further satisfies the following conditions:

1.27≤ f 2/ f≤ 5.06;

−3.75≤( R 3+ R 4)/( R 3− R 4)≤−1.11;

0.28 mm≤ d 3≤0.93 mm; where:

f: the focal length of the camera optical lens;

f2: a focal length of the second lens;

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

R4: a curvature radius of the image side surface of the second lens;

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

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

2.03≤ f 2/ f≤ 4.05;

−2.34≤( R 3+ R 4)/( R 3− R 4)≤−1.38;

0.45 mm≤ d 3≤0.74 mm.

8. The camera optical lens as described in claim 1 , wherein the camera optical lens further satisfies the following conditions:

1.38≤( R 5 +R 6)/( R 5− R 6)≤4.60;

0.11 mm≤ d 5≤0.39 mm; where

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

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

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

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

−3.09≤ f 3/ f≤− 1.50;

2.21≤( R 5+ R 6)/( R 5− R 6)≤3.68;

0.18 mm≤ d 5≤0.31 mm.

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

−1.26≤( R 7+ R 8)/( R 7− R 8)≤−0.25;

0.16 mm≤ d 7≤1.10 mm; where

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:

1.15≤ f 4/ f≤ 2.19;

−0.79≤( R 7+ R 8)/( R 7− R 8)≤−0.31;

0.25 mm≤ d 7≤0.88 mm.

12. The camera optical lens as described in claim 1 , wherein the camera optical lens further satisfies the following conditions:

−8.93≤ f 5/ f≤− 1.19;

−7.15( R 9+ R 10)/( R 9− R 10)≤−1.26;

0.21 mm≤ d 9≤0.68 mm; where

f: the focal length of the camera optical lens;

f5: a focal length of the fifth lens;

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

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

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

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

−5.58≤ f 5/ f≤− 1.49;

−4.47≤( R 9+ R 10)/( R 9− R 10)≤−1.57;

0.34 mm≤ d 9≤0.54 mm.

14. The camera optical lens as described in claim 1 , wherein the camera optical lens further satisfies the following conditions:

3.45≤ f 6/ f≤ 30.31;

5.08≤( R 11+ R 12)/( R 11− R 12)≤34.69;

0.53 mm≤ d 11≤1.65 mm; where

f: the focal length of the camera optical lens;

f6: a focal length of the sixth lens;

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

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

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

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

0.52≤ f 6/ f≤ 24.25;

8.13≤( R 11+ R 12)/( R 11− R 12)≤27.75;

0.85 mm≤ d 11≤1.32 mm.

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

0.45≤ f 12/ f≤ 2.19; where

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

f: the focal length of the camera optical lens.

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

0.72≤ f 12/ f≤ 1.75.

18. 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 5.87 mm.

19. The camera optical lens as described in claim 18 , wherein the total optical length TTL of the camera optical lens is less than or equal to 5.60 mm.

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

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