Camera optical lens

1. A camera optical lens, comprising a lens group having a plurality of lens units and an aperture stop; wherein one of the lens units is provided with a coding surface having a wavefront coding surface near the aperture stop; wherein a rise Z of the coding surface satisfies the following condition: Z=Z1+Z2, where Z1 is a rise of a traditional surface, and Z2 is a rise of the wavefront coding surface.

2. The camera optical lens as described in claim 1 , wherein Z1 satisfies an even aspherical equation.

3. The camera optical lens as described in claim 1 , wherein Z2 satisfies the following condition:

Z

⁢

⁢

2

=

B

⁢

⁢

λ

2

⁢

π

⁡

(

n

-

1

)

⁢

(

D

/

2

)

3

⁢

(

x

3

+

y

3

)

,

x

2

+

y

2

≤

(

D

/

2

)

2

Where B is wavefront coding index, n is the refractive index of the material forming the wavefront coding surface at dominant wavelength λ, D is aperture size (diameter) of the wavefront coding surface, x/y is the coordinate of wavefront coding surface.

4. The camera optical lens as described in claim 3 , wherein the wavefront coding index B satisfies the following condition:

5π≤B≤50 π.

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

0≤ds ≤0.2 mm, where ds is a distance from the aperture stop to an edge of the wavefront coding surface along the optical axis.

6. The camera optical lens as described in claim 1 , wherein the lens group includes 4 lens units.

7. The camera optical lens as described in claim 1 , wherein the coding surface is located at an object side of the aperture stop.

8. The camera optical lens as described in claim 1 , wherein the coding surface is located at an image side of the aperture stop.