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Proceedings Paper

Chemical imaging system
Author(s): James O. Jensen; Agustin I. Ifarraguerri; William R. Loerop; Winthrop Wadsworth; Jens-Peter Dybwad
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Paper Abstract

The Chemical Imaging System (CIS) is a small, high-speed long-wave infrared (8 - 12 micrometers ) imaging spectrometer which is currently under development by the United States Army. The fielded system will operate at 360 scans per second with a large format focal-plane-array. Currently, the CIS uses the TurboFT FTS in conjunction with a 16-pixel direct-wired HgCdTe detector array. The TurboFT spectrometer provides high-speed operation in a small, lightweight package. In parallel to the hardware development, an algorithm and software development effort is underway to address some unique features of the CIS. The TurboFT-based system requires a non-uniform sampling Fourier transform algorithm in order to preserve signal fidelity. Also, the availability of multiple pixels can be exploited in order to improve the interference suppression capabilities of the system by allowing the detection and identification algorithm to adapt its parameters to the changing background. Due to the enormous amount of data generated, the signal processing must proceed at very high rate. High-speed computers operating with a parallel architecture are required to process the data in real time. This paper describes the current CIS bread box system. It includes some field measurement results followed by a discussion of the issues and challenges associated with meeting the design goals set for the program.

Paper Details

Date Published: 7 February 2002
PDF: 11 pages
Proc. SPIE 4574, Instrumentation for Air Pollution and Global Atmospheric Monitoring, (7 February 2002); doi: 10.1117/12.455168
Show Author Affiliations
James O. Jensen, U.S. Army Soldier and Biological Chemical Command (United States)
Agustin I. Ifarraguerri, U.S. Army Soldier and Biological Chemical Command (United States)
William R. Loerop, U.S. Army Soldier and Biological Chemical Command (United States)
Winthrop Wadsworth, Designs and Prototypes, Ltd. (United States)
Jens-Peter Dybwad, Designs and Prototypes, Ltd. (United States)

Published in SPIE Proceedings Vol. 4574:
Instrumentation for Air Pollution and Global Atmospheric Monitoring
James O. Jensen; Robert L. Spellicy, Editor(s)

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