Abstract
A method that achieves automatic measurements of the orthogonal components of the motion of optically rough surfaces is described. An optical set-up that implements a speckle rotation is used to extract the components of 2-D displacements, which are obtained from simultaneous data recording performed by a single 1-D CCD line. A temporal analysis of speckle patterns related with a given inspected area of a moving structure is then possible. The movement trajectory is reconstructed. The principle of the method and the experimental set-up are described. Experimental results are shown with a specific application to the dynamic analysis of thermal deformations of mechanical parts.
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