Related Experiment Video
Updated: Jul 18, 2026
09:16
Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
Published on: January 9, 2017
Visible and near-infrared backscattering spectroscopy for sizing spherical microparticles
Lucía B Scaffardi1, Fabián A Videla, Daniel C Schinca
1Centro de Investigaciones Opticas, CONICET-CIC, La Plata, Argentina.
Applied Optics
|December 15, 2006
Summary
Near-infrared backscattering spectroscopy offers a simplified method for determining microparticle size. This technique, utilizing Fourier transform and Mie theory, accurately sizes particles from 8 to 60 micrometers.
Area of Science:
- Applied Physics
- Spectroscopy
- Materials Science
Background:
- Particle size determination is crucial in various scientific and industrial applications.
- Spectroscopic analysis of backscattering offers a simplified experimental setup.
- Mie theory provides a theoretical framework for light scattering by particles.
Purpose of the Study:
- To develop and validate a technique for microparticle sizing using near-infrared (NIR) backscattering spectroscopy.
- To establish an algorithm based on Fourier transform (FT) and Mie theory for accurate particle diameter determination.
- To extend the applicability of backscattering spectroscopy to a wider range of microparticle sizes.
Main Methods:
- Utilized near-infrared (NIR) backscattering spectroscopy.
- Developed an algorithm incorporating Fourier transform (FT) and Mie theory.
- Employed cross-correlation between experimental and theoretical spectra for enhanced accuracy.
Main Results:
- Successfully sized microparticles in the 8 to 60 micrometer diameter range.
- Identified three NIR wavelength intervals for analyzing different diameter ranges.
- Reduced uncertainty in diameter determination by 30-40% through cross-correlation analysis.
Conclusions:
- NIR backscattering spectroscopy combined with FT and Mie theory is a powerful tool for microparticle sizing.
- The technique extends previous methods, enabling analysis of larger microparticles.
- This approach could form the basis for a portable and practical particle sizing instrument.
