Special Section on Speckle-Based Metrology

Extraction of dynamic speckle activity information from digital holograms

[+] Author Affiliations
Nicolas Budini

Universidad Nacional del Litoral, Facultad de Ingeniería Química, Sgo. del Estero 2829, S3000AOM Santa Fe, Argentina

Instituto de Física del Litoral (IFIS Litoral), Güemes 3450, S3000GLN Santa Fe, Argentina

Nicolas Balducci

Instituto de Física del Litoral (IFIS Litoral), Güemes 3450, S3000GLN Santa Fe, Argentina

Cecilia Mulone

Universidad Tecnológica Nacional, Facultad Regional Paraná, Av. Almafuerte 1033, E3100XAI Paraná, Argentina

Andrea C. Monaldi

Universidad Nacional de Salta, Instituto de Investigaciones en Energía No Convencional, Av. Bolivia 5150, A4408FVY Salta, Argentina

Opt. Eng. 55(12), 121716 (Jul 15, 2016). doi:10.1117/1.OE.55.12.121716
History: Received April 27, 2016; Accepted June 23, 2016
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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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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Nicolas Budini ; Nicolas Balducci ; Cecilia Mulone and Andrea C. Monaldi
"Extraction of dynamic speckle activity information from digital holograms", Opt. Eng. 55(12), 121716 (Jul 15, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.121716


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