Intensity-based dynamic speckle method for analysis of variable-rate dynamic events

Elena Stoykova; Lian Nedelchev; Blaga Blagoeva; Branimir Ivanov; Mikhail Levchenko; Nataliya Berberova-Buhova; Dimana Nazarova

doi:10.1117/12.2673462

15 August 2023 Intensity-based dynamic speckle method for analysis of variable-rate dynamic events

Elena Stoykova, Lian Nedelchev, Blaga Blagoeva, Branimir Ivanov, Mikhail Levchenko, Nataliya Berberova-Buhova, Dimana Nazarova

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Proceedings Volume 12618, Optical Measurement Systems for Industrial Inspection XIII; 1261829 (2023) https://doi.org/10.1117/12.2673462
Event: SPIE Optical Metrology, 2023, Munich, Germany

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Abstract

We study efficiency of intensity-based dynamic speckle method for characterization of dynamic events which occur at variable rate in time within the temporal averaging interval. We checked the ability of the method to describe the speed of evolution by i) numerical simulation at variable speed, ii) processing of speckle patterns obtained from phase distributions fed to a SLM at controllable change of the temporal correlation radius of speckle intensity fluctuations and iii) conducting experiments with a polymer solution drying by using a hot-stage. The numerical and SLM simulation experiments allowed for modification of the used estimates in order to obtain relevant information.

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Elena Stoykova, Lian Nedelchev, Blaga Blagoeva, Branimir Ivanov, Mikhail Levchenko, Nataliya Berberova-Buhova, and Dimana Nazarova "Intensity-based dynamic speckle method for analysis of variable-rate dynamic events", Proc. SPIE 12618, Optical Measurement Systems for Industrial Inspection XIII, 1261829 (15 August 2023); https://doi.org/10.1117/12.2673462

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