dc36af23   
   From: rrllff@yahoo.com   
      
   On Apr 17, 12:29 am, Louis Boyd  wrote:   
      
      
   > 3.  Enhanced infrared cameras.  These have their highest sensitivity in   
   > the red-and infrared.  The Sony ExView cameras are an example.  They   
   > have about 3x higher sensitivity in the IR, about like 1 and 2 in the   
   > visible.  These work well to a few hundred yard range with a telephoto   
   > lenses and partially focused diode IR laser.  ExView CCDs cost more and   
   > usually have more defects than "plain" ccds.   
   >   
      
   I believe the Exview CCD response curve has a similar shape to a   
   normal CCD camera, being more sensitive in the visible than the near   
   IR.  However, it is more sensitive.   
      
   http://www.richardfisher.com   
      
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