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Proceedings Paper

New developments on standoff detection of explosive materials by differential reflectometry
Author(s): Claus Schöllhorn; Anna M. Fuller; Julien Gratier; Rolf E. Hummel
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Paper Abstract

Differential reflectometry (DR) is an effective tool to supplement existing explosives detection systems thus making the combined unit more effective than one tool alone. It is an optical technique in which the investigative light beam emanates from an extended distance onto the substance under investigation, thus rendering it to be a standoff method. The applicable distance still needs to be determined but could be well within the 50 to 100 m range. Specifically, differential reflectometry (also known as Differential reflection spectroscopy) is a surface analytical technique that reveals details about the electron structure. In other words, the instrument allows the measurement of the energies that electrons absorb from photons as they are raised into higher, allowed energy states. Since each material has a specific electron structure the measurement of the characteristic energies for "electron transitions" serves as a means (i.e. a fingerprint) for identifying these substances. The DR device can be made portable, it is fast, safe for the public, does not require human involvement, is cost effective, and most of all, it is a standoff technique which does not require ingestion of a suspicious substance into an instrument.

Paper Details

Date Published: 26 April 2007
PDF: 8 pages
Proc. SPIE 6554, Chemical and Biological Sensing VIII, 65540C (26 April 2007); doi: 10.1117/12.722429
Show Author Affiliations
Claus Schöllhorn, Univ. of Florida (United States)
Anna M. Fuller, Univ. of Florida (United States)
Julien Gratier, Univ. of Florida (United States)
Rolf E. Hummel, Univ. of Florida (United States)

Published in SPIE Proceedings Vol. 6554:
Chemical and Biological Sensing VIII
Augustus W. Fountain III, Editor(s)

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