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Proceedings Paper

Two-dimensional angular optical scattering (TAOS) measurements of single airborne microparticles: transition to clusters and dual-wavelength absorption studies
Author(s): Stephen Holler; Mario Surbek; Yongle Pan; Richard K. Chang
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Paper Abstract

We extend our previous work on two-dimensional angular optical scattering (TAOS) patterns to water droplets with inclusions and absorption studies at two different wavelengths. Using an acoustic levitator, the TAOS from water droplets containing polystyrene latex sphere inclusions is observed as the droplet evaporates leaving only a dry aggregate of spheres. Dramatic changes in the TAOS patterns occur even when the droplet still has a large volume fraction of water. Two wavelengths (266 nm and 532 nm) are used to examine the TAOS patterns from droplets containing tryptophan. The effect absorption has on the angular scattering peaks is presented. Such dual wavelength measurements can provide useful information to those working on the inverse problem.

Paper Details

Date Published: 21 December 1999
PDF: 11 pages
Proc. SPIE 3853, Environmental Monitoring and Remediation Technologies II, (21 December 1999); doi: 10.1117/12.372847
Show Author Affiliations
Stephen Holler, Yale Univ. (United States)
Mario Surbek, Yale Univ. (United States)
Yongle Pan, New Mexico State Univ. (United States)
Richard K. Chang, Yale Univ. (United States)

Published in SPIE Proceedings Vol. 3853:
Environmental Monitoring and Remediation Technologies II
Tuan Vo-Dinh; Robert L. Spellicy, Editor(s)

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