Microstructure movements study by dynamic speckle analysis

Laurent Brunel; Alice Brun; Patrick Snabre

doi:10.1117/12.695493

15 September 2006 Microstructure movements study by dynamic speckle analysis

Laurent Brunel, Alice Brun, Patrick Snabre

Proceedings Volume 6341, Speckle06: Speckles, From Grains to Flowers; 634127 (2006) https://doi.org/10.1117/12.695493
Event: Speckle06: Speckles, From Grains to Flowers, 2006, Nimes, France

Abstract

In paint and ink industries, no commercial instruments can perform non-intrusive monitoring of the drying process. We propose here an optical instrument, called HORUS(R), that monitors the drying process of any product deposited on any substrate by analyzing micro-structure movement of the product. Most of drying processes have in common that this movement becomes slower with time. On the basis of the "multi-speckle diffusing wave spectroscopy" (MSDWS) technique, we propose here a simple and robust algorithm called ASII for "adaptive speckle imaging interferometry", able to detect in real time the micro-structure agitation by plotting what we call "speckle rate" (SR) as a function of time. We show the hardware configuration and 3 typical experiments made with HORUS(R) film formation analyser.

Citation Download Citation

Laurent Brunel, Alice Brun, and Patrick Snabre "Microstructure movements study by dynamic speckle analysis", Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 634127 (15 September 2006); https://doi.org/10.1117/12.695493

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