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Proceedings Paper

High-performance field-portable imaging radiometric spectrometer technology for chemical agent detection
Author(s): Alexandre Vallières; Martin Chamberland; Vincent Farley; Louis Belhumeur; André Villemaire; Jean Giroux; Jean-François Legault
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Paper Abstract

Standoff detection, identification and quantification of chemicals in the gaseous state are fundamental needs in several fields of applications. Additional required sensor characteristics include high sensitivity, low false alarms and high-speed (ideally real-time) operation, all in a compact and robust package. The thermal infrared portion of the electromagnetic spectrum has been utilized to implement such chemical sensors, either with spectrometers (with none or moderate imaging capability) or with imagers (with moderate spectral capability). Only with the recent emergence of high-speed, large format infrared imaging arrays, has it been possible to design chemical sensors offering uncompromising performance in the spectral, spatial, as well as the temporal domain. Telops has developed a novel instrument that can not only provide an early warning for chemical agents and toxic chemicals, but also one that provides a "Chemical Map" of the field of view and is man portable. To provide to best field imaging spectroscopy instrument, Telops has developed the FIRST, Field-portable Imaging Radiometric Spectrometer Technology, instrument. This instrument is based on a modular design that includes: a high performance infrared FPA and data acquisition electronics, onboard data processing electronics, a high performance Fourier transform modulator, dual integrated radiometric calibration targets and a visible boresighted camera. These modules, assembled together in an environmentally robust structure, used in combination with Telops' proven radiometric and spectral calibration algorithms make this instrument a world-class passive standoff detection system for chemical imaging.

Paper Details

Date Published: 28 October 2005
PDF: 9 pages
Proc. SPIE 5990, Optically Based Materials and Optically Based Biological and Chemical Sensing for Defence II, 59900U (28 October 2005); doi: 10.1117/12.632069
Show Author Affiliations
Alexandre Vallières, TELOPS Inc. (Canada)
Martin Chamberland, TELOPS Inc. (Canada)
Vincent Farley, TELOPS Inc. (Canada)
Louis Belhumeur, TELOPS Inc. (Canada)
André Villemaire, TELOPS Inc. (Canada)
Jean Giroux, TELOPS Inc. (Canada)
Jean-François Legault, Telops USA Inc. (United States)

Published in SPIE Proceedings Vol. 5990:
Optically Based Materials and Optically Based Biological and Chemical Sensing for Defence II
Anthony W. Vere; John C. Carrano; Arturas Zukauskas; James G. Grote; Francois Kajzar, Editor(s)

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