From: mgashaw@gmail.com   
      
   I have been trying to design an asymmetrical Fresnel lens for illumination   
   purpose. The commercial software that I have at hand is Zemax. And in this   
   software Fresnel lens are defined for only rotational symmetric surfaces.Is   
   there anyone who knows how    
   to implement it in that software in different way or is there any other option?   
      
   Thank you.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)