We use volumetric diffusing plastic shell or plate for color mixing the LED array. The info from the vendor is just material and % of added particles like SiO2. Substrate is typical PMMA or similar plastic.
Give just info like this what’s the best or simple way to simulate this in Zemax NSC? I’m thinking of Mie or H-Greenstein model but not sure how to set up parameters there with just info like this.