Required Spectral Resolution for Bioaerosol Detection Algorithms Using Standoff Laser-Induced Fluorescence Measurements

We have developed and tested a standoff biological aerosol detection demonstrator employing ultraviolet laser-induced fluorescence. It is based on commercially available components including a pulsed 355-nm laser and an intensified charge-coupled device camera. Biological warfare simulants and inter...

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Bibliographic Details
Published in:IEEE sensors journal Vol. 10; no. 3; pp. 655 - 661
Main Authors: Farsund, O., Rustad, G., Kasen, I., Haavardsholm, T.V.
Format: Journal Article
Language:English
Published: New York IEEE 01.03.2010
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Aerosols
Algorithm design and analysis
Algorithms
Cameras
Channels
Charge coupled devices
Data analysis
Detection algorithms
Fluorescence
Fluorescence spectroscopy
Laboratories
object detection
Optical computing
Optical pulses
Photons
Spectra
spectral analysis
Spectral resolution
Testing
Ultraviolet
ISSN:1530-437X, 1558-1748
Online Access:Get full text
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Summary:We have developed and tested a standoff biological aerosol detection demonstrator employing ultraviolet laser-induced fluorescence. It is based on commercially available components including a pulsed 355-nm laser and an intensified charge-coupled device camera. Biological warfare simulants and interferents were released and measured in open air field and closed-chamber laboratory tests. We analyzed the experimental data at different spectral resolutions, using statistics-based anomaly detection, and spectral angle mapping algorithms. The results show that less than 20 spectral channels in the 350-700-nm spectral region are sufficient in order to discriminate between the agents released using these methods. This corresponds to sacrificing high spectral resolution for the benefit of more photons in each channel and reduced computation time.
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ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2009.2037794