Remote infrared vapor detection of volatile organic compounds

Robert T. Kroutil; Roger J. Combs; Robert B. Knapp; Gary W. Small

doi:10.1117/12.166745

31 January 1994 Remote infrared vapor detection of volatile organic compounds

Robert T. Kroutil, Roger J. Combs, Robert B. Knapp, Gary W. Small

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166745
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

In many open-air monitoring applications of Fourier transform spectrometry (FTS), the lack of a valid background reference spectrum limits the ability to perform quantitative measurements. Suppression of the broad band detector envelope overcomes this limitation. Interferogram processing provides a means of suppressing the broad band background, while maintaining the target spectral signatures of interest. A combination of interferogram segment selection, digital filtering, and pattern discrimination techniques achieve the background suppression of the variable broad band detector envelope. The spectral band position, width, and strength of the target vapor determine the parameters that are used for background suppression. Interferogram segment selection depends primarily on spectral band width. Digital filter design requires inputs of both spectral band position and width. The pattern discrimination techniques compensate for variation in the spectral shape with band strength.

Citation Download Citation

Robert T. Kroutil, Roger J. Combs, Robert B. Knapp, and Gary W. Small "Remote infrared vapor detection of volatile organic compounds", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166745

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