On Thursday, May 29, 2014 10:56:22 AM UTC-4, Helpful person wrote:   
   > On Thursday, May 29, 2014 8:08:07 AM UTC-4, haitic...@gmail.com wrote:   
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   >   
   >   
   > That's why a bolometer may be the best instrument.   
   > Conceptually it can capture all wavelengths.  Very simply   
   > one could have an absorber that covers the whole spectrum   
   > (easier said than done, but not impossible) and measure   
   > temperature changes.  The real work is in the details.   
      
   Well a bolometer would be kinda fun to make, but I see all sorts of messy   
   details.  (ambient temperature changes for one.)  I guess one could make a   
   balanced design.. a second reference bolometer that you drive to get zero   
   temperature difference.   
      
   A photodiode and DMM (ammeter) is just some much easier.   
      
   George H.   
   >   
   > http://www.richardfisher.com   
      
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