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Standoff detection: classification of biological aerosols using laser induced fluorescence (LIF) technique

Hausmann, Anita and Duschek, Frank and Fischbach, Thomas and Pargmann, Carsten and Aleksejev, Valeri and Poryvkina, Larisa and Sobolev, Innokenti and Babichenko, Sergey and Handke, Jürgen (2014) Standoff detection: classification of biological aerosols using laser induced fluorescence (LIF) technique. In: Proceedings of SPIE - The International Society for Optical Engineering. SPIE.DSS 2014 Defense and Security, 5.-9. Mai 2014, Baltimore, USA.

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Abstract

The release of chemical, biological and explosive (CBE) hazardous materials is a very important and recurring topic concerning personal safety and security. Consistently, the public is shocked by attacks of varying dimensions, which expedites the retrieval of methods to detect and identify hazardous materials at an early stage without having contact to the danger area, inducing the correct counteractions in time to reduce the risk to the public and the emergency services. Especially the detection of biological agents is a major challenge. Laser-based stand-off detection methods, for example LIF, are distance-pillowed, discrete and reliable. The fluorescence signals are distinguishing for the excited molecules and thus allow a relatively accurate classification. Particularly important is the application under real outdoor conditions in order to consider the atmospheric effects, as well as the use of wavelengths in the eye-safe range below 400 nm. Hence, all LIF measurements were studied on a free transmission range at a distance of 20 m from the laser source upon 280 and 355 nm excitation, respectively, to increase the number of discriminating attributes. A number of different chemical and biological substances were tested for their characteristic fluorescence signals and fluorescence lifetimes. The latter are investigated by a gated iCCD camera and analyzed with dedicated software for spectral pattern recognition. The direct comparison of all results leads to a first classification of the various compounds. Finally, the substances are aerosolized to simulate a possible realistic propagation of these materials. The preliminary results confirm classification capabilities of the method.

Item URL in elib:https://elib.dlr.de/89587/
Document Type:Conference or Workshop Item (Speech)
Title:Standoff detection: classification of biological aerosols using laser induced fluorescence (LIF) technique
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hausmann, Anitaanita.hausmann (at) dlr.deUNSPECIFIED
Duschek, FrankFrank.Duschek (at) dlr.deUNSPECIFIED
Fischbach, Thomasthomas.fischbach (at) dlr.deUNSPECIFIED
Pargmann, Carstencarsten.pargmann (at) dlr.deUNSPECIFIED
Aleksejev, ValeriLDI InnovationUNSPECIFIED
Poryvkina, LarisaLDI InnovationUNSPECIFIED
Sobolev, InnokentiLDI InnovationUNSPECIFIED
Babichenko, SergeyLDI InnovationUNSPECIFIED
Handke, Jürgenjuergen.handke (at) dlr.deUNSPECIFIED
Date:8 May 2014
Journal or Publication Title:Proceedings of SPIE - The International Society for Optical Engineering
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:Standoff detection, CBE, laser induced fluorescence (LIF), hazardous material detection, aerosol
Event Title:SPIE.DSS 2014 Defense and Security
Event Location:Baltimore, USA
Event Type:international Conference
Event Dates:5.-9. Mai 2014
Organizer:SPIE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology
Location: Lampoldshausen
Institutes and Institutions:Institute of Technical Physics > Atmospheric Propagation and Effect
Deposited By: Hausmann, Anita
Deposited On:08 Aug 2014 06:56
Last Modified:31 Jul 2019 19:46

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