Improved laser-induced fluorescence method for bio-attack early warning detection system

• Laser Induced Fluorescence (LIF) could permit fast early warning systems either for point or standoff detection if a reliable classification of warfare biological agents versus biological or non-biological fluorescing background can be achieved. In order to improve LIF discrimination capability, a new system is described in which the fluorescence pattern is enriched by the use of multiple wavelength delayed excitation while usual spectral fluorescence analysis is extended to time domain to use both aspects as criteria for classification. General considerations and guidelines for the system design are given as well as results showing good discrimination between background and simulants.

Subject headings

NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)

Keyword

Bio-aerosol detection

Biological detection

Biological warfare agent detection

Periodically poled non-linear crystal

UV laser

Agents

Atmospheric aerosols

Chemical warfare

Laser produced plasmas

Lasers

Military applications

Time domain analysis

Fluorescence

Publication and Content Type

ref (subject category)

kon (subject category)