Measurement of diameters of ultrafine particles based on characteristics of fluctuation of scattered light

Jin Shen; Shulian Yang; Qang Ding; Yanting Cheng

doi:10.1117/12.782888

26 November 2007 Measurement of diameters of ultrafine particles based on characteristics of fluctuation of scattered light

Jin Shen, Shulian Yang, Qang Ding, Yanting Cheng

Author Affiliations +

Proceedings Volume 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 67230G (2007) https://doi.org/10.1117/12.782888
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China

Abstract

The characteristic of fluctuation of scattered light from ultra fine particles carries information about diameters of particles. This information is traditionally extracted by photon correlation spectroscopy (PCS). For this technique, temporal autocorrelation function is utilized to analyze fluctuating scattered light of particles to get information of particle size. Besides temporal autocorrelation function, both temporal coherence degree and fractal dimension of scattered light from ultra fine particles can also be used to diagnose diameter of particles. From experiments, the fractal dimensions of dynamic scattered light intensity signal of particles with the diameter of 60nm, 90nm, 200nm, 300nm and 450nm were obtained. Experimental results showed the monotony relationship between fractal dimension of scattered light intensity signal of particles, which indicates that the fractal dimension of scattered light signal can also be used to analyze particle size. However fractal dimension, as well as temporal coherence degree, can only provide the mean particle size, not the particle size distribution.

Citation Download Citation

Jin Shen, Shulian Yang, Qang Ding, and Yanting Cheng "Measurement of diameters of ultrafine particles based on characteristics of fluctuation of scattered light", Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 67230G (26 November 2007); https://doi.org/10.1117/12.782888

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