Ultraviolet (UV)/visible absorption spectroscopy for atmospheric pollution measurements

Christos G. Stergis

doi:10.1117/12.186607

14 September 1994 Ultraviolet (UV)/visible absorption spectroscopy for atmospheric pollution measurements

Christos G. Stergis

Proceedings Volume 2282, Ultraviolet Technology V; (1994) https://doi.org/10.1117/12.186607
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

Citation Download Citation

Christos G. Stergis "Ultraviolet (UV)/visible absorption spectroscopy for atmospheric pollution measurements", Proc. SPIE 2282, Ultraviolet Technology V, (14 September 1994); https://doi.org/10.1117/12.186607

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