Newsgroup sci.techniques.spectroscopy 2803

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               AOTF Spectroscopy
                     by
              Dr. Jon W. Carnahan
          Northern Illinois University
             November 12, 1996
In recent years, our laboratory has sought to 
apply the technologies of acousto-optics to 
analytical spectroscopy. Acousto-optical 
devices consist of optically transparent 
materials (in the wavelength region of 
interest) to which near-acoustic compression 
waves are applied. As these compression waves 
traverse the material, the periodic variations 
in material density produce interactions with 
optical radiation which result in either angular 
displacement of the radiation or wavelength-
tunable optical transmission, depending upon 
the system configuration. In this talk, the 
fundamentals of these devices will be highlighted 
and our early applications of these devices to 
analytical spectrometry are discussed. 
Implications concerning the use of these devices 
for atomic emission background correction and 
monochromators for atomic and molecular 
spectroscopy will be outlined.
see our web page at
http://homepage.interaccess.com/~bhudgens

SpXZeigR (Spec-Zeig-er) is a collection of routines to make production of
publication quality plots from raw spectrocopic data easier in Igor Pro. 
It is targeted at those who would like to use Igor Pro to work off-line on
analysis, manipulation, and graphing of data from techniques such as
photoemission spectroscopy, infrared spectroscopy, and thin film x-ray
diffraction.
Version 1.3ß of the SpXZeigR routines works under Igor Pro 2.0 and supports
  Move on X or Y - supplements curve drag in graph windows
  Cascade - an easy way to stack curves in a graph window
  Rescale - multiply data by a factor
  Normalize - set max/min to 1/0, linking other files as needed
  Compare - compare two waves
     types: difference, ratio, log(ratio) and others
  Baseline Fit - fit a baseline under a curve
     ranges: inside cursors, outside cursors, both with extrapolation
     types: polynomial, follow data, cosine, and integrated
  FFT Smooth - apply a filter in FFT domain
     types: low pass or Wiener with Gauss/Lorentz peak shape
  Peak Fit - fit a curve with any number of peaks
     styles: singlets, doublets, and reference
     shapes: Gauss, Sym. or Asym. Lorentz, Voigt and these with tails
Tutorials, demos, a help file, and a manual are provided.
The SpXZeigR package can be obtained as a BinHex version of a Compact Pro
archive via anonymous ftp from the Wavemetrics site at
  ftp://d31rz0.stanford.edu/WaveMetrics/IgorPro/User_Contributions/
You will need StuffIt Expander to unpack the routines.  WaveMetrics has
demo versions of Igor Pro available at their Web site
(http://www.wavemetrics.com), so SpXZeigR is basically BYOM (bring your
own Mac) software, for those who might like to try it out.
Enjoy!
-- 
Chemistry Department/Chemical & Materials Engineering Department
Materials Science Building 125, South Loop Road
University of Alabama in Huntsville,  Huntsville, AL    35899
phone:(205)890-6954  fax:(205)890-6349  http://matsci.uah.edu/~weimer/

Hi  Spectroscopists!!!!
We are a small instrumentation company and we are actually involved in
some research projects for the detection of pollutants. We use
spectroscopic techniques in the near-IR spectral region and the gases
to be revealed are: CO, H2S and CH4 .
Could someone help us in some literature search?
We need some high resolution spectra of the substancies above in the
spectral region 1.5 - 1.6 µm.
We know there are some databases (ex. HITRAN), but we do not have the
possibility to access to them, so we would be very grateful if someone
can do it for us.
Many Thanks
Sabrina 
please answer by email
lab.tri@mediacom.it