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9 January 2002 Analysis of an in-situ fiber optic backscatter probe
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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.
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Barry Gross, Fred Moshary, Yiping Zhang, and Samir A. Ahmed "Analysis of an in-situ fiber optic backscatter probe", Proc. SPIE 4484, Lidar Remote Sensing for Industry and Environment Monitoring II, (9 January 2002);

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