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- W2371282188 abstract "To measure the dynamic deformation of an object surface in real time accurately,this paper proposes a spatial carrier phase-shifting shearing speckle system based on a slit aperture.A Michelson interferometer was used to generate a shearing distance and a spatial frequency shift by tilting a small angle in one of the two mirrors.A slit aperture was used to control the speckle size and the spatial spectral width.The Fourier transform and inverse transform were applied to accurate calculation of the phase and to obtain the phase distribution by using only a single image.Finally,the shearing speckle system was used to measure the dynamic deformation of a circumferentially fixed thin aluminum plate with a point load at the center.The effects of optical system parameters on the measuring results were analyzed.The experimental results show that when the shearing distance is 25 mm and the slit aperture size in Xdirection is 1mm,it is possible to obtain a better phase-map quality by using a higher spatial frequency CCD camera with a pixel size of 4.65μm×4.65μm and an imagelens with a focus length of 8 mm.It demonstrates that the shearing speckle system obtains the information of deformation in real time under a capturing rate of 25frame/s and an angle of view field43.6°,and the measurable range of displacement peak value is from 0.5μm to 30μm." @default.
- W2371282188 created "2016-06-24" @default.
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- W2371282188 date "2015-01-01" @default.
- W2371282188 modified "2023-09-23" @default.
- W2371282188 title "Shearing speckle interferometry based on slit aperture for dynamic measurement" @default.
- W2371282188 hasPublicationYear "2015" @default.
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