J. Phys. III France
Volume 6, Numéro 8, August 1996
Page(s) 1117 - 1125
DOI: 10.1051/jp3:1996108
J. Phys. III France 6 (1996) 1117-1125

A Simple Method of Determining Diffusion Coefficient by Digital Laser Speckle Correlation

Giuseppe Schirripa Spagnolo, Dario Ambrosini, Antonio Ponticiello and Domenica Paoletti

Dipartimento di Energetica, Università di l'Aquila Località, Monteluco di Roio, 67040 Roio Poggio, Italy

(Received 5 February 1996, revised 22 April 1996, accepted 24 May 1996)

A laser speckle technique is proposed for the study of diffusion in transparent liquid mixtures. The diffusion constants may be deduced by a simple manipulation of the speckle patterns recorded during the diffusion process. The proposed method, checked with the LiBr-water system, gives reasonable agreement with existing data.

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