On Thursday, February 6, 2014 9:59:28 AM UTC-5, gghe...@gmail.com wrote:   
   > On Wednesday, February 5, 2014 10:59:29 PM UTC-5, haitic...@gmail.com wrote:   
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   > > > > I just pulled the trigger on a $199 usb spectrometer with light   
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   > > > > fiber. It's on science-surplus.com. It uses a ccd array inside and   
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   > > > > kinda slow (I remember 350 ms.), but the price is right. I'm hoping   
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   > > > > it will be sensitive enough. Can you give any opinion, from your   
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   > > > > Rolls Royce window? :)   
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   > > > Cool, thanks for the steer.  I just  bought one too.  I'll probably hack    
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   > > > it up for another project, using a fibre bundle for the input slit.   
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   > > I just talked with on fone - I bought the $199 special, and they are going   
   to change out the grating to give the wide range 600 lines version. I can give   
   you their fone # if you want. He said, with their rough calibration, you get   
   10 nm resolution,    
   but can go to 2 with calibration. He went into some gotchas with me me. They   
   were:   
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   > > -don't touch the grating surface   
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   > > -One focusing mirror has 5 screws holding it down - have to loosen   
   opposite screw as you tighten a screw - tension can crack mirror if you   
   don't...   
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   > > -There was a third that I can't remember, but I imagine you don't want to   
   align while drinking! :)    
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   > > Did you get the unaligned El Cheapo?    
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   > > OH, he said 50 ms. per spectrum time.   
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   > > JB   
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   > Interesting Thanks!     
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   > What I'd really like is a monochromator.     
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   > Say if someone has one of these could they take the cover off and snap a   
   picture of what it looks like inside.     
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   > George H.   
      
   Hi George,   
   Yes, I'd like one of those as well. Let me call the guy and see if a   
   non-working spectrophotometer could be had cheap. I imagine you could put a PD   
   at a certain position in diff grating spectrum, and get what you are looking   
   for. ?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)