Zone plate based on Monte Carlo sampling of the Fresnel-Kirchhoff integral
Author: Erik Knudsen
Origin: DTU Physics
Date: June 16, 2009
A component which models a zone plate by consierding the plate a secondary source
and then by means of Monte Carlo sampling, evaluating the Fresnel-Kirchhoff integral
implicitly by resampling the beam in a window defined by the focus_xw,focus_yh parameters.
Caveat emptor: this is a computationally heavy component to run.
The zone plate can be iether circular or linear. In the linear case, the "slits" are
along the x-axis.
Parameters in boldface are required;
the others are optional.
The outer radius of the zone plate. Triggers a circular zone plate. Takes precedence over xwidth,yheight.
Width of linear zone plate.
Height of linear zone plate
The nominal wavelength that the zone plate is designed to focus.
Offset of resampling window along the x-axis.
Offset of resampling window along the y-axis.
Width of the resampling window.
Height of the resampling window.
Distance along the z-axis from zone plate to the resampling window.