The formation of a speckle interferogram under a double-exposure recording of a speckle photograph to reduce the interferometer sensitivity threshold to a longitudinal displacement of a scattering flat surface is analyzed. It is shown that the proposed technique of recording, where a photoplate is displaced transversely before the second exposure, allows us to determine the sign of the longitudinal scatterer displacement. The experimental results obtained are in agreement with the theoretical calculations.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 53–59, July, 2008.
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Gusev, V.G. Recording a speckle interferogram to control the longitudinal displacement of a diffusively scattering flat surface. Russ Phys J 51, 718–724 (2008). https://doi.org/10.1007/s11182-008-9101-7
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DOI: https://doi.org/10.1007/s11182-008-9101-7