Effective phase function of light scattered at small angles by polydisperse particulate media

I. Turcu

doi:10.1117/12.803911

5 June 2008 Effective phase function of light scattered at small angles by polydisperse particulate media

I. Turcu

Proceedings Volume 7022, Advanced Laser Technologies 2007; 70220A (2008) https://doi.org/10.1117/12.803911
Event: Advanced Laser Technologies 2007, 2007, Levi, Finland

Abstract

Particles with typical dimensions higher than the light wavelength and relative refraction indexes close to one, scatter light mainly in the forward direction where the scattered light intensity has a narrow peak. For particulate media accomplishing these requirements the light scattered at small angles in a far-field detecting set-up can be described analytically by an effective phase function (EPF) even in the multiple scattering regime. The EPF model which was built for monodispersed systems has been extended to polydispersed media. The main ingredients consist in the replacement of the single particle phase function and of the optical thickness with their corresponding averaged values. Using a Gamma particle size distribution (PSD) as a testing model, the effect of polydispersity was systematically investigated. The increase of the average radius or/and of the PSD standard deviation leads to the decrease of the angular spreading of the small angle scattered light.

Citation Download Citation

I. Turcu "Effective phase function of light scattered at small angles by polydisperse particulate media", Proc. SPIE 7022, Advanced Laser Technologies 2007, 70220A (5 June 2008); https://doi.org/10.1117/12.803911

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