Issue Eur. Phys. J. Appl. Phys. Volume 40, Number 3, December 2007 Page(s) 305 - 310 Section Characterization of Materials: Imaging,\ Microscopy and Spectroscopy DOI 10.1051/epjap:2007163 Published online 13 December 2007

Eur. Phys. J. Appl. Phys. 40, 305-310 (2007)
DOI: 10.1051/epjap:2007163

Speckle size, intensity and contrast measurement application in micron-size particle concentration assessment

D. Chicea

Physics department, University Lucian Blaga, Str. Dr. Ion Ratiu 7-9, 550012 Sibiu, Romania

dan.chicea@ulbsibiu.ro

(Received: 7 April 2007 / Accepted: 11 September 2007 / Published online: 13 December 2007)

Abstract
A transmission type of experiment was set-up to investigate coherent light scattering on suspensions with scattering centers having a wider size distribution. For each sample the contrast, the average intensity and the average speckle size of the far interference field were calculated using an alternative simple algorithm that is presented in detail. The variation of the far field parameters with the scattering centers concentration is presented. A possible application in measuring the scattering centers concentration in the very small values range is suggested and the range is indicated.

PACS
42.30.Ms - Speckle and moire patterns.
42.30.Va - Image forming and processing.

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