This example computes light propagation of incident plane waves (at oblique angle of incidence) through an isolated slit:
Since the geometry of this setup exhibits two mirror symmetries you can reduce the computational domain to a quarter domain (at higher numerical efficiency). This is shown in section Exploiting Mirror Symmetry.
In a first post process, the Fourier transform for the upper half space is computed (output file
transmitted_fourier_transform.jcm). In a subsequent post-process
OpticalImaging this Fourier transform is mapped to
image_fourier_transform.jcm modelling the light transfer through the optical system (as defined in the post-process
OpticalImaging). You can use a Cartesian export post-process to compute the so formed coherent image. The following figure shows the image in different -slices (image planes displaced along -direction), for -polarized illumination.