a65a50bc   
   From: mathma18@gmail.com   
      
   On Thursday, May 9, 2013 6:41:03 PM UTC+5:30, Narasimham Gudipaty wrote:   
   > On May 7, 6:40 pm, boxman  wrote:   
   ....   
      
   > Thanks. So, in fact is it a point to point imaging effected through a   
   > Cartesian aplanatic in the refracting portion? (Am unable to get to   
   > see the book).   
      
   Or,if used here in non-imaging application then wave-front does not arrive at   
   target in the same phase as at source,right? I am trying to find at least one   
   example anywhere.. as per Descartes' original expectation.   
      
   Regards   
   Narasimham   
      
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