Parabolic mirror with small distances about shadow3 HOT 2 CLOSED

Hello,
if you use a parabolic mirror is because you want a focus a collimated source. Therefore the source divergence must be zero (or close to zero). Then I suggest to select the automatic setting of the parabola parameters and you get a perfect focusing (as in parabolic mirror.ows.zip ).

If you want to use the roughness option (this option is not very used however) you need the RMS value (you have it) but also the spectral power density of the surface map. An old document with an example of this option is in https://github.com/srio/shadow3-docs/blob/master/doc/SHADOW_roughness.pdf

from shadow3.

I added a roughness example workspace in https://github.com/oasys-kit/ShadowOui-Tutorial

you can import it in OASYS from the URL
https://raw.githubusercontent.com/oasys-kit/ShadowOui-Tutorial/master/OTHER_EXAMPLES/roughness_demo.ows

from shadow3.