# Products

Laser AccesoriesGeneral OpticsBeam ExpandersPolarization opticsCollimating LensesLaser CrystalsLasersPCV and PCX Axicon Lens

Axicon lens also known as conical lens or rotationally symmetric prism is widely used in different scientific research and application. Axicon can be used to convert a parallel laser beam into a ring, to create a non-diffractive Bessel beam or to focus a parallel beam into long focus depth.

CSPE produce axicons with cone angles from 140° to 179.5°.

Axicon is usually characterized by the ratio of the diameter of the ring to the distance from the lens tip to the image plane **d/l**.

Sample axicon calculations

n*sin a=sin b

For d = 20mm, l = 200mm

tan (b-a) = 10/200 = 0.05

b-a=2.8624°

If n=1.5062 then b-a = (n-1)a = 0.5062*a = 2.86° and a=5.65° b = 8.52°

Cone angle 180°-5.65°*2=168.7°

Diameter, mm | a | Glass type | Center Thickness |
---|---|---|---|

25.40 | 5,0° | BK7 | 6,0 |

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