1 November 2010 Imaging standoff detection of explosives using widely tunable midinfrared quantum cascade lasers
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Abstract
The use of a tunable midinfrared external cavity quantum cascade laser for the standoff detection of explosives at medium distances between 2 and 5 m is presented. For the collection of the diffusely backscattered light, a high-performance infrared imager was used. Illumination and wavelength tuning of the laser source was synchronized with the image acquisition, establishing a hyperspectral data cube. Sampling of the backscattered radiation from the test samples was performed in a noncooperative geometry at angles of incidence far away from specular reflection. We show sensitive detection of traces of trinitrotoluene and pentaerythritol tetranitrate on real-world materials, such as standard car paint, polyacrylics from backpacks, and jeans fabric. Concentrations corresponding to fingerprints were detected, while concepts for false alarm suppression due to cross-contaminations were presented.
© (2010) Society of Photo-Optical Instrumentation Engineers (SPIE)
Frank Fuchs, Frank Fuchs, Stefan Hugger, Stefan Hugger, Michel Kinzer, Michel Kinzer, Rolf Aidam, Rolf Aidam, Wolfgang Bronner, Wolfgang Bronner, Rainer Lösch, Rainer Lösch, Quankui K. Yang, Quankui K. Yang, Kai A. Degreif, Kai A. Degreif, Frank H. Schnürer, Frank H. Schnürer, } "Imaging standoff detection of explosives using widely tunable midinfrared quantum cascade lasers," Optical Engineering 49(11), 111127 (1 November 2010). https://doi.org/10.1117/1.3506195 . Submission:
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