Hallo,
I am relatively new to zemax and i was trying to make a rough surface with very low reflectivity. How do i achieve this?
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In NSC mode just add a coat with correct reflection characteristics.
In NSC (Non-Sequential) Mode, there’s a tab on the objects menu for Coat/Scatter. If you are just concerned with % of specular reflection, you can give the surface a coating that has the appropriate reflectance. If you’re interested in scatter, you’ll need to use the scatter setting and pick one of the canned scatter profiles and then trace A LOT of rays (don’t forget to turn on “Scatter Rays” when you trace them). If you don’t mind spending a month on the theory and math, you can create your own scatter profile as a BRDF.
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