Correlation properties of light multiply scattered from powders

Takashi Okamoto; Shuta Yanagita

doi:10.1117/12.426998

8 May 2001 Correlation properties of light multiply scattered from powders

Takashi Okamoto, Shuta Yanagita

Proceedings Volume 4416, Optical Engineering for Sensing and Nanotechnology (ICOSN 2001); (2001) https://doi.org/10.1117/12.426998
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '01), 2001, Yokohama, Japan

Abstract

Intensity correlations of speckle patterns formed by multiple scattered light from a powder bed are investigated experimentally. Decorrelation of the speckle patterns is measured by changing the angle and the area of laser beam illumination. The proportional relationship between the transport mean free path and the average particle diameter is obtained when the powder samples of the same type are used in the angular correlation measurements. It is also found that the particle size affects the speckle decorrelation due to the translation of the illuminating area on the powder surface. This result exhibits a contrast to a single scattering diffuse object for which the degree of speckle correlation is independent of the characteristics of the diffuser.

Citation Download Citation

Takashi Okamoto and Shuta Yanagita "Correlation properties of light multiply scattered from powders", Proc. SPIE 4416, Optical Engineering for Sensing and Nanotechnology (ICOSN 2001), (8 May 2001); https://doi.org/10.1117/12.426998

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