From: me@here.com   
      
   In article , Mikko OH2HVJ  wrote:   
   >BR  writes:   
   >   
   >> Conservation of etendue (product of source area & solid angle the   
   >> source subtends):   
   >   
   >> 2. On the source side, you have to treat the 8 LEDS as a single   
   >> source, with the 'source area' being the areas of the LEDs plus the   
   >> empty areas between them. So you may want to arrange them as compact   
   >> as you practically can.   
   >   
   >Thanks, I'll try to do this. One idea was actually a custom package   
   >with the LED chips mounted on a 2mm circle.   
   >   
      
   I apologize, I had responded to the wrong poster: Might it be possible   
   to combine the different wavelength LED's using either a grating or   
   prism to reduce them to one single source? Adding in a broadband   
   white LED would throw this scheme off, but you might still be able   
   to achieve white if the LED's overlapped enough.   
      
   d.   
      
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