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This article is cited in 1 scientific paper (total in 1 paper)
Physics
Digital speckle photography with correlation processing of spatial spectrum of specklegram for determination of micro displacement of scattering object
L. A. Maksimovaa, P. V. Ryabukhob, N. Yu. Mysinaa, V. P. Ryabukhob a Institute of Precision Mechanics and Control, Russian Academy of Sciences, Saratov
b Saratov State University
Abstract:
The method of digital speckle photography for determining of speckle pattern displacement with sub-pixel accuracy using correlation processing of summary spatial spectrum of speckle patterns is considered in this article. It is assumed that displacement of speckle pattern is caused by deformation or displacement of an object with a scattering surface. The method of phase shift of interference pattern in diffraction halo is proposed for expanding the lower limit of measuring range of speckle pattern displacement to subpixel values. The method is based on numerical additional phase shifts of complex spatial spectra of displacement and non-displacement speckle patterns. The results of numerical and natural experiments are presented.
Keywords:
speckle-pattern, digital speckle-photography, speckle-interferometry, diffraction halo, spatial spectrum, correlation analysis, micro displacement.
Citation:
L. A. Maksimova, P. V. Ryabukho, N. Yu. Mysina, V. P. Ryabukho, “Digital speckle photography with correlation processing of spatial spectrum of specklegram for determination of micro displacement of scattering object”, Izv. Sarat. Univ. Physics, 15:3 (2015), 5–11
Linking options:
https://www.mathnet.ru/eng/isuph234 https://www.mathnet.ru/eng/isuph/v15/i3/p5
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Abstract page: | 31 | Full-text PDF : | 10 | References: | 10 |
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