On Monday, December 29, 2014 9:06:55 AM UTC-5, Phil Hobbs wrote:   
   > I'll probably have to get a couple to play with.  The nonpolarizing thing   
   and the asymmetry make them potentially harder to use than PBSes for anything   
   at all fancy--for instance if the phase shift between p and s is more than a   
   degree or two, the    
   output polarization will be a mess.    
   >    
   > Cheers   
   >    
   > Phil Hobbs   
      
   Hi Phil, (and I thought SO was dead.)     
   If there is any absorption you get a phase shift.    
   (But you know that.)   
   We've used the phase shift in metallic beam splitters.   
   I have never seen the dielectric ones.     
      
   George H.   
      
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