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MODULE MOD.001: BEAM SHAPING
Module MOD.001: Beam Shaping
Abstract
In VirtualLab the design of beam shapers is based on a standard transmission design algorithm. The module
supports the user in setting up the parameters for this algorithm and results in a standard transmission
design document that is used to perform the beam shaping design. The usage of the module is explained
in the Application Scenario MO.001 "Illumination of Rectangular Area (Top Hat) with High Homogeneity by
Di=ractive Beam Shaper".
Author:
Hagen Schweitzer, LightTrans GmbH
Keywords:
Di=ractive Optics, Di=ractive Optical Elements,
Beam Shaper, Beam Shaping, Computer Generated
Holograms (CGH), Phase Plate
Requirements:
VirtualLab version 4.0.1 or higher – Di=ractive Optics Toolbox
Modules are not applicable for the Trial Version.
Scenario Version:
1.1
Sample Files:
Corresponding files can be found here.
Related Scenarios:
MO.001
Description
The optimization of di=user, beam shaper and beam splitter using the standard transmission design algorithm requires setting up input field and signal field with correct sampling parameters. The sampling parameters of
both fields depend on the optical setup and on the distance between transmission and target plane. For the calculation within the module a Fresnel
setup or 1f/2f-Fourier setup is assumed. Within the module pixelation of the
transmission is considered.
The module calculates in a first step the required pixel size of the transmission in order to reach su;cient large di=raction angles to di=ract light in
the whole signal field. As an alternative the automatic calculation of pixel
size can be deactivated and a manual pixel size can be entered by the user.
In a second step the sampling of the input field is calculated. To simulate
the rectangular shape of the transmission pixel for Fresnel setups more than
one sampling points per pixel of the input field are required. By default the
minimum number of two sampling points per pixel is used. It follows from