18 April 1978 Decorrelation Produced In The Image Of A Diffusing Object By A Rotation Of The Incident Wave-Application To The Study Of Surface States
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Proceedings Volume 0136, 1st European Conf on Optics Applied to Metrology; (1978); doi: 10.1117/12.956173
Event: First European Conference on Optics Applied to Metrology, 1977, Strasbourg, France
Abstract
The goal of this experiment is to demonstrate local differences in surface state on a diffusing object by double speckle photography. We record on a single holographic plate two images of the diffusing object lit with coherent light; between the two exposures we slightly modify the angle of incidence of the light beam. We then use the interference fringes produced in the Fourier plane of this double photograph; their visibility characterizes the correlation between the two speckle figures, related to the local surface state. By an appropriate filtering setup it is then possible to visually localize on the image zones of different rugosity.
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Michel Menu, Marie-Louise Roblin, "Decorrelation Produced In The Image Of A Diffusing Object By A Rotation Of The Incident Wave-Application To The Study Of Surface States", Proc. SPIE 0136, 1st European Conf on Optics Applied to Metrology, (18 April 1978); doi: 10.1117/12.956173; https://doi.org/10.1117/12.956173
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