Aperture Material about xrt

[kklmn]

I don't have ready examples.

If your interest is only in attenuation by the aperture material, you can use your aperture object like this: After aperture.propagate() convert the bad rays (those absorbed) to good and attenuate their intensity. Here you need to get the path from ray cosines (a, b, c) and get the absorption coefficient for each energy per ray. In total only a handful lines.

If you want edge effects, such as propagation through a knife edge or propagation through a 'scatterless slit' crystal, an aperture class is not enough. You will need to combine optical element made of plates to make a four-sided aperture. A composite OE is exemplified in 10_MultipleReflect/MontelMirror.py or BentTaperedPolyCapillary.py.

If you have experimental results for what you want to model and you can share them, I could prepare a new public example.

[twguest]

Thankyou for your quick response.
The purpose would be to introduce and model mask defects for an interference lithography setup.

[kklmn]

Then this is a pure geometrical effect, isn't it? How material properties can alter it?
For pure geometry, you can modify propagate method of your aperture to include shape functions or simply use PolygonalAperture with many vertices to mimic your shape errors.