12 May 2016 Standoff detection: distinction of bacteria by hyperspectral laser induced fluorescence
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Sensitive detection and rapid identification of hazardous bioorganic material with high sensitivity and specificity are essential topics for defense and security. A single method can hardly cover these requirements. While point sensors allow a highly specific identification, they only provide localized information and are comparatively slow. Laser based standoff systems allow almost real-time detection and classification of potentially hazardous material in a wide area and can provide information on how the aerosol may spread. The coupling of both methods may be a promising solution to optimize the acquisition and identification of hazardous substances. The capability of the outdoor LIF system at DLR Lampoldshausen test facility as an online classification tool has already been demonstrated. Here, we present promising data for further differentiation among bacteria. Bacteria species can express unique fluorescence spectra after excitation at 280 nm and 355 nm. Upon deactivation, the spectral features change depending on the deactivation method.
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Arne Walter, Arne Walter, Frank Duschek, Frank Duschek, Lea Fellner, Lea Fellner, Karin M. Grünewald, Karin M. Grünewald, Anita Hausmann, Anita Hausmann, Sandra Julich, Sandra Julich, Carsten Pargmann, Carsten Pargmann, Herbert Tomaso, Herbert Tomaso, Jürgen Handke, Jürgen Handke, "Standoff detection: distinction of bacteria by hyperspectral laser induced fluorescence", Proc. SPIE 9824, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVII, 98240Y (12 May 2016); doi: 10.1117/12.2223769; https://doi.org/10.1117/12.2223769

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