Abstract
Peculiarities of the spatial behaviour of the dislocation lines resulting from scattering of coherent radiation from random and fractal rough surfaces are studied. The technique of optical correlation is proposed for diagnostics of phase singularities in a complex speckle field by comparing the correlation lengths of amplitude and intensity of the local fields. It is shown that the dislocation lines in the field scattered by a fractal surface have fractal properties, while the dis- location lines scattered off a random surface have no fractal properties.
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