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Proceedings Paper

Analysis of an in-situ fiber optic backscatter probe
Author(s): Barry Gross; Fred Moshary; Yiping Zhang; Samir A. Ahmed
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Paper Abstract

Elastic Light Scattering is a powerful technique to probe the optical properties of particulate systems. In particular, multi-spectral extinction and multi-angular scattering based on Fraunhofer diffraction have been used with varying degrees of success to probe particulate polydispersions. However, multi-angle scattering methods require complex detector geometries while extinction methods suffer from errors due to forward scattering. In this paper, we examine the use of an in-situ multimode fiber optic backscatter probe to collect multi-spectral backscatter data supplemented by multi-spectral extinction data. To perform particle sizing, efficiency kernels must be constructed that determines the absolute backscatter signal as a function of the particle size parameter (q) for unit concentration. These efficiency kernels can then be used to invert calibrated multi-spectral data. Within this scheme, the extinction measurements act as an empirical correction factor to the backscatter measurement kernels.

Paper Details

Date Published: 9 January 2002
PDF: 10 pages
Proc. SPIE 4484, Lidar Remote Sensing for Industry and Environment Monitoring II, (9 January 2002); doi: 10.1117/12.452792
Show Author Affiliations
Barry Gross, CUNY/City College (United States)
Fred Moshary, CUNY/City College (United States)
Yiping Zhang, CUNY/City College (United States)
Samir A. Ahmed, CUNY/City College (United States)

Published in SPIE Proceedings Vol. 4484:
Lidar Remote Sensing for Industry and Environment Monitoring II
Upendra N. Singh, Editor(s)

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