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Imaging standoff detection of explosives by diffuse reflectance IR laser spectroscopy

: Fuchs, F.; Jarvis, J.P.; Hugger, S.; Kinzer, M.; Yang, Q.K.; Bronner, W.; Driad, R.; Aidam, R.

Aschenbruck, N. (Ed.); Martini, P.; Meier, M.; Tölle, J.:
Future Security. 7th Security Research Conference 2012. Proceedings : Bonn, Germany, September 4-6, 2012
Berlin: Springer, 2012 (Communications in computer and information science 318)
ISBN: 978-3-642-33160-2 (Print)
ISBN: 978-3-642-33161-9 (Online)
ISBN: 3-642-33160-2
ISSN: 1865-0929
Security Research Conference "Future Security" <7, 2012, Bonn>
Conference Paper
Fraunhofer IAF ()

In this work we demonstrate standoff detection of traces of explosives using mid-infrared laser spectroscopy. We apply active laser illumination and use an infrared camera for collection of the diffusely backscattered laser radiation. The key component of the system is an external cavity quantum cascade. Different numerical hyperspectral image analysis methods are evaluated with respect to target detection performance and false alarm rate using both synthetic and real spectroscopic data. Traces of TNT, PETN and RDX could be identified and discriminated against non-hazardous materials by scanning the illumination wavelength over several characteristic absorption features of the explosives.