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Hurst exponent analysis of moving metallic surfaces |
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| Authors: | HC Soares L da Silva DC Lobão DP Caetano JAO Huguenin |
| Institution: | 1. Programa de Pós-Graduação em Modelagem Computacional em Ciência e Tecnologia, Universidade Federal Fluminense, Volta Redonda, RJ 27255-125, Brazil;2. Departamento de Física, Instituto de Ciências Exatas, Universidade Federal Fluminense, RJ 27213-415, Volta Redonda, Brazil;3. Departamento de Ciências Exatas, Universidade Federal Fluminense, Volta Redonda, RJ 27255-125, Brazil |
| Abstract: | We report on the application of Hurst exponent analysis to digital speckle patterns for investigating moving rough surfaces in the presence of defects. Digital speckle patterns were generated by recording the scattered light from moving surfaces illuminated by a laser beam. It was found that it is possible to identify the presence of the defects by means of the variation of the Hurst exponent along the sample. |
| Keywords: | Hurst exponent Dynamical speckle pattern Rough surfaces |
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