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   > > 1. How daunting is it to whip up a FTNIR?   
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   > Hard.  The motion precision is the first issue, and keeping the detected   
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   > amplitude stable throughout the motion is the second.  Then there's   
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   > calibration.   
      
      
   Motion aside, how difficult is it to put together the optics of an FTIR?   
      
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