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  4. Imaging standoff trace detection of explosives using IR-laser based backscattering
 
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2016
Conference Paper
Title

Imaging standoff trace detection of explosives using IR-laser based backscattering

Abstract
We perform active hyperspectral imaging using tunable mid-infrared (MIR) quantum cascade lasers for contactless identification of solid and liquid contaminations on surfaces. By collecting the backscattered laser radiation with a camera, a hyperspectral data cube, containing the spatially resolved spectral information of the scene is obtained. Data is analyzed using appropriate algorithms to find the target substances even on substrates with a priori unknown spectra. Eye-save standoff detection of residues of explosives and precursors over extended distances is demonstrated and the main purpose of our system. Using a MIR EC-QCL with a tuning range from 7.5 µm to 10 µm, detection of a large variety of explosives, e.g. TNT, PETN and RDX and precursor materials such as Ammonium Nitrate could be demonstrated. In a real world scenario stand-off detection over distances of up to 20 m could be successfully performed. This includes measurements in a post blast scenario demonstrating the potential of the technique for forensic investigations.
Author(s)
Fuchs, F.
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Hugger, Stefan  
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Jarvis, J.
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Yang, Quankui
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Ostendorf, Ralf  
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Schilling, Christian  
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Bronner, Wolfgang  
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Driad, Rachid  
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Aidam, Rolf  
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Wagner, J.
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Mainwork
Micro- and Nanotechnology Sensors, Systems, and Applications VIII  
Conference
Micro- and Nanotechnology Sensors, Systems, and Applications Conference 2016  
DOI
10.1117/12.2223581
Language
English
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Keyword(s)
  • external cavity quantum cascade lasers

  • active hyperspectral imaging

  • mid-infrared spectroscopy

  • stand-off detection of explosives

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