ec578016   
   From: me@here.com   
      
   In article <849d1035-4c0c-4e8b-a294-a9e5ebc1d5d7@p37g2000prp.goo   
   legroups.com>, BR  wrote:   
   >Conservation of etendue (product of source area & solid angle the   
   >source subtends):   
   >   
   >1. Essentially the etendue your receiving fiber bundle is known   
   >   
   >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.   
   >   
   >3. Once you have decided how to arrange them, the solid angle of the   
   >'composite' source will have to be measured/calculated.   
   >   
   >4. If you source etendue is much larger than that of your receiver,   
   >then not much light will be coupled into it.   
   >   
   >BR   
      
   If the LED's are of different wavelengths, would it be possible   
   to combine them into a smaller "source" using either a grating   
   or a prism?   
      
   d.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)