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Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Estimation of scattering phase function utilizing laser Doppler power density spectra.

S Wojtkiewicz¹, A Liebert, H Rix

¹Nalecz Institute of Biocybernetics and Biomedical Engineering, Warsaw, Poland. swojtkiewicz@ibib.waw.pl

Physics in Medicine and Biology

|January 24, 2013

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A novel method estimates particle light scattering phase functions using laser Doppler spectra. This technique accurately measures scattering across all angles for various particle shapes, crucial for optical property determination.

Area of Science:

Optics and Photonics
Particle Characterization
Spectroscopy

Background:

Accurate estimation of light scattering phase functions is vital for understanding particle optical properties.
Existing methods may have limitations in angular range or particle shape applicability.

Purpose of the Study:

To introduce a new method for estimating the light scattering phase function of particles.
To enable measurement across the full angular range (0°-180°) for particles of any shape.

Main Methods:

Analysis of laser Doppler (LD) power density spectra.
Development of a phantom measurement setup with an LD system and a flow cell.
Validation using Monte Carlo simulations.

Main Results:

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The method successfully estimates the light scattering phase function in the full angular range.
Estimation error for the scattering phase function was investigated concerning the anisotropy factor (g).
Low estimation errors (<10% for g > 0.5) were achieved, decreasing with increasing anisotropy.

Conclusions:

The proposed LD-based method offers a robust approach for determining particle light scattering phase functions.
The technique is accurate and reliable, even with noise, for characterizing particle optical properties.