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Simulation of dynamic speckle sequences and its application to the analysis of transient processes |
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| Authors: | A Federico GH Kaufmann GE Galizzi H Rabal M Trivi R Arizaga |
| Institution: | aFísica y Metrología, Instituto Nacional de Tecnología Industrial, P.O. Box B1650WAB, B1650KNA San Martín, Argentina bInstituto de Física Rosario (CONICET-UNR), Bvd. 27 de Febrero 210 bis, S2000EZP Rosario, Argentina cCentro de Investigaciones Opticas and UID Optimo, Facultad de Ingeniería, Universidad Nacional de la Plata, P.O. Box 124, 1900 La Plata, Argentina |
| Abstract: | Dynamic speckle has been used in recent years to analyse several transient processes that are produced in industrial and biological applications. We present here a numerical simulation to generate a temporal sequence of dynamic speckle patterns which is based on a model used for speckle formation by the superposition of waves from discrete scattering centres. It is demonstrated that the first and second statistics of the intensity of each speckle image, the time history of the speckle pattern, the temporal evolution of the correlation coefficient, and the power spectral density of the intensity generated by the proposed model reproduce quite well those obtained from experimentally recorded data. The process of a fast drying paint is presented as an example of the application of the proposed numerical model. |
| Keywords: | Speckle metrology Dynamic speckle Speckle correlation Paint drying |
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