ZEMAX: Software For Optical System Design
| Ray Scattering |
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In addition to partial reflections at surfaces, rays can also scatter due to microscopic roughness of the surface. ZEMAX supports many detailed models of scattering from optical surfaces, including Lambertian (used for very rough, highly scattering surfaces), Gaussian (typically used for modeling the scattering of a well-polished surface and ABg, which is used mainly for inputing measured scattering functions. There is also a powerful user-defined scattering function capability to allow you to add your own scattering distribution functions.
See the detailed discussion on scattering here.
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