At DLR Lampoldshausen, bioorganic substances are measured, based on laser induced fluorescence (LIF), and subsequently classified. In this work, a procedure is presented, which utilizes lots of information (time-dependent spectral data, local information) and predicts the presence of hazardous substances by statistical data analysis. For that purpose, studies are carried out on a free transmission range at a distance of 22m at two different excitation wavelengths alternating between 280nm and 355 nm. Time-dependent fluorescence spectra are recorded by a gated intensified CCD camera (iCCD). An automated signal processing allows fast and deterministic data collection and a direct subsequent classification of the detected substances. The variation of the substance parameters (physical state, concentration) is included within this method.
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Thomas Fischbach, Frank Duschek, Anita Hausmann, Carsten Pargmann, Valeri Aleksejev, Larisa Poryvkina, Innokenti Sobolev, Sergey Babichenko, Jürgen Handke, "Standoff detection and classification procedure for bioorganic compounds by hyperspectral laser-induced fluorescence," Proc. SPIE 9455, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVI, 945508 (22 May 2015);