Extraction of dynamic speckle activity information from digital holograms

Nicolas Budini; Nicolas Balducci; Cecilia Mulone; Andrea C. Monaldi

doi:10.1117/1.OE.55.12.121716

15 July 2016 Extraction of dynamic speckle activity information from digital holograms

Nicolas Budini, Nicolas Balducci, Cecilia Mulone, Andrea C. Monaldi

Author Affiliations +

Optical Engineering, Vol. 55, Issue 12, 121716 (July 2016). https://doi.org/10.1117/1.OE.55.12.121716

Abstract

In this work we show how dynamic speckle information can be extracted directly from digital holograms. This allows improving the analysis and characterization of dynamic phenomena by combining dynamic speckle with digital holographic interferometry measurements. We have studied the drying process of paint coatings, which is a typical study case in the field of dynamic speckle characterization, since the speckle activity (SA) of drying coatings is known to decay smoothly as a function of time. We recorded both holograms and speckle images during the process. In this way, we could compare the evolution of global SA calculated from speckle images by a standard method with the evolution of speckle correlation extracted directly from the holograms. The results obtained from both methods have shown to be in good agreement.

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Nicolas Budini, Nicolas Balducci, Cecilia Mulone, and Andrea C. Monaldi "Extraction of dynamic speckle activity information from digital holograms," Optical Engineering 55(12), 121716 (15 July 2016). https://doi.org/10.1117/1.OE.55.12.121716

Published: 15 July 2016

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