Axicon Lens

A Thorlabs Axicon Lens AX2520-UV model is used in this file to convert a plane wave input beam into a ring profile. 

Notes: 

• The raytrace is performed coherently using FRED’s Gaussian Beam Decomposition technique. 
• To minimize ray errors at the center point of the conic surface, a large number of rays need to be traced. 
• A grid of 201 x 201 is deemed sufficient. 
• The ring profile can be seen by plotting either the Irradiance, Energy Density, or Scalar Field profile at the Image Plane.

Associated FRED file:FRED_AxiconLensExample.frd