Analysis of an in-situ fiber optic backscatter probe

Barry Gross; Fred Moshary; Yiping Zhang; Samir A. Ahmed

doi:10.1117/12.452792

9 January 2002 Analysis of an in-situ fiber optic backscatter probe

Barry Gross, Fred Moshary, Yiping Zhang, Samir A. Ahmed

Proceedings Volume 4484, Lidar Remote Sensing for Industry and Environment Monitoring II; (2002) https://doi.org/10.1117/12.452792
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

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.

Citation Download Citation

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); https://doi.org/10.1117/12.452792

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KEYWORDS

Sensors

Particles

Backscatter

Scattering

Signal detection

Light scattering

Refractive index

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