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Scattering And Absorption of Light in Planetary Regoliths

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Published on: July 1, 2019

Sizing homogeneous spherical particles from intensity-only angular scatter.

Wei Li¹, Jules S Jaffe

¹Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China. aliceliwei@gmail.com

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|February 4, 2010

Summary

This summary is machine-generated.

This study introduces algorithms to determine particle size from light scattering data, particularly for low-contrast, spherical particles. Results show specific scattering measurements can accurately estimate particle size near the light

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Area of Science:

Optical Physics
Materials Science
Computational Physics

Background:

Accurate particle size determination is crucial in various scientific fields.
Low-contrast spherical particles present unique challenges for size retrieval.
Mie theory and inverse tomography are established methods for analyzing light scattering.

Purpose of the Study:

To develop and compare algorithms for retrieving the size of spherically symmetric particles.
To focus on low-contrast particles with specific refractive indices and sizes (π ≤ ka < 16π).
To evaluate algorithm performance under noisy conditions.

Main Methods:

Development of algorithms based on Mie theory matching.
Application and adaptation of inverse tomography methods for intensity-only data.
Evaluation of algorithm stability and performance with moderate noise.

Main Results:

Algorithm performance varied with particle size, refractive index, and chosen method.
Inverse tomography methods, adapted for intensity-only data, showed promise.
The S(1) scattering component (scatter perpendicular to incident polarization) is effective for size estimation.

Conclusions:

Accurate size estimation of homogeneous, low-contrast, spherical particles is achievable.
The S(1) scattering measurement is a viable technique for particles with diameters near the incident light wavelength.
Algorithm selection and data acquisition strategy impact retrieval accuracy.