From: mgashaw@gmail.com   
      
   On Tuesday, November 5, 2013 3:18:48 PM UTC+1, Phil Hobbs wrote:   
   > On 11/05/2013 07:00 AM, Gashaw Melesse wrote:   
   >    
   > > 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.   
   >    
   > >   
   >    
   >    
   >    
   > Making the mould for a general asymmetrical Fresnel lens could be a bit    
   >    
   > pricy.  Hard to machine, and a lot of surface relief for binary optics.    
   >    
   >   Why do you need something so fancy for such an apparently mundane    
   >    
   > application?   
   >    
   >    
   >    
   > Cheers   
   >    
   >    
   >    
   > Phil Hobbs   
   >    
   >    
   >    
   > --    
   >    
   > Dr Philip C D Hobbs   
   >    
   > Principal Consultant   
   >    
   > ElectroOptical Innovations LLC   
   >    
   > Optics, Electro-optics, Photonics, Analog Electronics   
   >    
   >    
   >    
   > 160 North State Road #203   
   >    
   > Briarcliff Manor NY 10510   
   >    
   >    
   >    
   > hobbs at electrooptical dot net   
   >    
   > http://electrooptical.net   
      
   Thank you for your reply.    
   The purpose is to create an asymmetrical light distribution like in street   
   light application where the illumination has to be longer than broader.   
      
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