5 May 2010 Short-range lidar for bioagent detection and classification
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We have developed a small, relatively lightweight and efficient short range (<100 m) LIDAR instrument for remotely detecting harmful bioagents. The system is based on a pulsed, eye-safe, 355 nm laser exciting aerosols which then fluoresce with a typical spectrum. The system makes use of a novel technology for continuously monitoring for the presence of unusual concentrations of bioaerosols at a precise remote location within the monitored area, with response within seconds. Fluorescence is spectrally resolved over 32 channels capable of photon counting. Results show a sensitivity level of 40 ACPLA of Bacillus Globigii, an anthrax simulant, at a distance of 100 m (assumed worst case where 1 ppl = 1 ACPLA) considering particle sizes between 0.5 and 10 μm, with a geometric mean at 1 um. The apparatus has been tested in the field during three test and evaluation campaigns with multiple bioagents and public security products. Preliminary results show that the system is able to distinguish between harmful bioagents and naturally occurring ones. A classification algorithm was successfully tested with a single type of bioagent; experiments for daytime measurements are discussed.
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Nicolas Hô, Nicolas Hô, Frédéric Émond, Frédéric Émond, François Babin, François Babin, Dave Healy, Dave Healy, Jean-Robert Simard, Jean-Robert Simard, Sylvie Buteau, Sylvie Buteau, John E. McFee, John E. McFee, "Short-range lidar for bioagent detection and classification", Proc. SPIE 7665, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XI, 76650A (5 May 2010); doi: 10.1117/12.849722; https://doi.org/10.1117/12.849722

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