From: pcdhSpamMeSenseless@electrooptical.net   
      
   On 04/15/2014 12:15 PM, haiticare2011@gmail.com wrote:   
   > snip   
   >>   
   >>   
   >>> 1. How daunting is it to whip up a FTNIR?   
   >>   
   >>   
   >>   
   >> Hard.  The motion precision is the first issue, and keeping the detected   
   >>   
   >> amplitude stable throughout the motion is the second.  Then there's   
   >>   
   >> calibration.   
   >   
   >   
   > Motion aside, how difficult is it to put together the optics of an FTIR?   
   >   
      
   It's the motion that's hard.  I've never built one myself, but AFAICT   
   the rest of it isn't that much harder than aligning a gas laser.   
   Getting it dialled in really right might be a bit slow if you don't have   
   a nice fast scan speed.   
      
   Motion irregularities in FTIR are a lot like sampling clock jitter in a   
   direct-sampling digital radio, except that, being mechanical, they're   
   usually much less well behaved.   
      
   Cheers   
      
   Phil Hobbs   
      
   --   
   Dr Philip C D Hobbs   
   Principal Consultant   
   ElectroOptical Innovations LLC   
   Optics, Electro-optics, Photonics, Analog Electronics   
      
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   Briarcliff Manor NY 10510   
      
   hobbs at electrooptical dot net   
   http://electrooptical.net   
      
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