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Proceedings Paper

Dispersive far-infrared Fourier transform spectrometer
Author(s): Christopher J. Chunnilall; William F. Sherman
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Paper Abstract

Two Mercury Cadmium Telluride (MCT) detectors have been evaluated for open-path Fourier transform infrared (FT-IR) spectrometry. The first detector was equipped with a standard manufacturers preamplifier; the second detector was equipped with a `linearizing' preamplifier. The two detectors and their respective preamplification systems were evaluated at varied light levels and open-path distances. Chloroform was chosen as an analyte of comparison because it has absorption frequencies at 1220 and 772 cm-1. These two frequencies allow for the visualization of non-linear absorption characteristics. Toluene monitored from a process stack also demonstrates this non-linearity. These data dramatically exhibit the need for a linear detection system in qualitative and quantitative infrared spectrometry.

Paper Details

Date Published: 31 January 1994
PDF: 2 pages
Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); doi: 10.1117/12.166574
Show Author Affiliations
Christopher J. Chunnilall, King's College London (United Kingdom)
William F. Sherman, King's College London (United Kingdom)

Published in SPIE Proceedings Vol. 2089:
9th International Conference on Fourier Transform Spectroscopy
John E. Bertie; Hal Wieser, Editor(s)

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