Hello Fellow Zemaxers,
I am relatively new to optical simulations with Zemax. Does anybody know how to assign optical Properties to Surfaces within an imported STEP file.
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/9f79c860-2706-4b7b-81a4-075ea27ee698.png)
the round face has a diffraction grating on it with x lines / µm.
How can I assign a mirror grating on this surface.
Kind Regards