Axicon Lens Example
This is a model of a Thorlabs Axicon Lens AX2520-UV which is used in this model to convert a plane wave input beam into a ring profile. 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. In this example it was deemed that a grid of 201 x 201 is sufficient. The ring profile can be seen by plotting either the Irradiance, Energy Density or Scalar Field profile at the Image Plane.