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Proceedings Paper

Two-dimensional angular scattering measurements of single airborne microparticles
Author(s): Stephen Holler; Yongle Pan; Jerold R. Bottiger; Steven C. Hill; David B. Hillis; Richard K. Chang
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Paper Abstract

The detection and characterization of micro-particles, particularly airborne biological particles, is currently of great interest. We present a novel technique for recording the 2D angular scattering pattern from a single airborne microparticle. Angular scattering measurements were performed in both the near-forward and near-backward regions for a variety of particles including for ethanol droplets, single polystyrene latex spheres, psl clusters, and clusters of Bacillus subtilis spores, all of various sizes. Because the angular scattering pattern is sensitive to size, shape and refractive index, the angular feature associate with clusters may be used to better characterize such airborne micro-particles. A watershed image processing routine has also been implemented. Through this routine, the number of intensity patches per solid angles is found to increase with cluster diameter.

Paper Details

Date Published: 18 January 1999
PDF: 9 pages
Proc. SPIE 3533, Air Monitoring and Detection of Chemical and Biological Agents, (18 January 1999); doi: 10.1117/12.336844
Show Author Affiliations
Stephen Holler, Yale Univ. (United States)
Yongle Pan, Yale Univ. (United States)
Jerold R. Bottiger, U.S. Army Edgewood Research, Development, and Engineering Ctr. (United States)
Steven C. Hill, Army Research Lab. (United States)
David B. Hillis, Army Research Lab. (United States)
Richard K. Chang, Yale Univ. (United States)

Published in SPIE Proceedings Vol. 3533:
Air Monitoring and Detection of Chemical and Biological Agents
Joseph Leonelli; Mark L.G. Althouse, Editor(s)

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