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  1. Newbie2

    Varied line spacing grating

    Hello everyone, Could someone explain how one can calculate the ruling polynomial equation for a varied line spacing grating or for a zone plate? I know the first coefficient (power 0) has to be the density at center but what about the others? Thanks!
  2. Newbie2

    Zemax Fresnel

    Hi everyone, I am trying to modelize a fresnel zoneplate with zemax. I have seen the "zoneplate" surface implemented in the software, but since the one I want to modelize has more than 250 rings it is not so helpful. So is the example "fresnel zp.zmx" which suggests to input each ring as a...

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