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Proceedings Paper

Ultraviolet (UV)/visible absorption spectroscopy for atmospheric pollution measurements
Author(s): Christos G. Stergis
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Paper Abstract

The primary objective of this effort is the development of instrumentation and techniques for determining the species, concentrations and lifetimes of atmospheric pollutants that may be generated by U.S. Air Force operations. The instrumentation being developed covers the spectral range of 200 nm to 900 nm, namely, the middle ultraviolet, the near ultraviolet, the visible and a portion of the near infrared. It has the capability of scanning throughout this range to look for unknown pollutants and also to look in detail at one or more suspected pollutants. The advantages of looking in this wavelength range, as well as some limitations, are discussed. Among the characteristics of the instrumentation that are described are the focal length and aperture ratio of the spectrometer, the gratings used, the spectral resolution and spectral dispersion of the spectrometer, the CCD detector, the digitization of the video signal, and the computer with the software needed for controlling the instrumentation and for recording and analyzing the data. Special attention is placed on the sensitivity of the instrumentation which is expected to be in the parts per trillion range for those molecules that have a substantial absorption cross section.

Paper Details

Date Published: 14 September 1994
PDF: 11 pages
Proc. SPIE 2282, Ultraviolet Technology V, (14 September 1994); doi: 10.1117/12.186607
Show Author Affiliations
Christos G. Stergis, Air Force Phillips Lab. (United States)

Published in SPIE Proceedings Vol. 2282:
Ultraviolet Technology V
Robert E. Huffman; Christos G. Stergis, Editor(s)

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