Retro Reflect

The Retro Reflect surface is a planar shape surface. If the surface is made of glass or air, rays refract according to Snell's law in the usual way. If the surface is made of "MIRROR", rays do not reflect in the usual way; instead the rays are undeviated. This means under subsequent propagation in the opposite direction the rays will follow the incident path; that is, the rays retro-reflect.

OpticStudio cannot accurately compute the optical path difference of rays retro-reflected from this surface if the aberrations are large (hundreds of times the diffraction limit) and the beam incident upon the retro-reflect surface is very fast (about F/2 or faster). For this reason, the retro reflect surface should only be used with reasonably slow beams and modest aberrations.

This surface uses no parameter values.

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