Fringe Variation and Visibility in Speckle-shearing Interferometry |
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| Authors: | J Fang |
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| Affiliation: | 1. Department of Mechanics , Peking University , Beijing, 100871, China;2. Baustatik, FB-11 , Universit?t Wuppertal , Pauluskirchstr. 7, 5600, Wuppertal 2, F .R. Germany |
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| Abstract: | Abstract Frequency spectra are analysed for two typical speckle-shearing interference recording methods; using a single aperture speckle-shearing camera (SASSC) and a double-aperture speckle-shearing camera (DASSC) to show the fringe variation due to the displacement involved in differentiation. Speckle statistics are then made for the filtering system to show the fringe-contrast variation resulting from the object deformation and the aperture of the filtering-image system. |
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