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20 November 1989 Fringe Modulation For The Separation Of Displacement Derivative Components In Speckle-Shearing Interferometry
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Abstract
Both optical information processing and digital image Processing are used for the component separation of the displacement derivatives in speckle shearing interferometry. In recording, a single-beam illuminates normally the object surface and two photographic plate record symmetrically the speckle field. Fringe carriers are introduced during the double exposures, which result in the frequency difference between the in-plane and the out-of-plane information. Through the ordeminterpolation of the modulated fringe carriers, the in-plane strain fringes are separated by digital-image subtraction.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Fang and H. M. Shi "Fringe Modulation For The Separation Of Displacement Derivative Components In Speckle-Shearing Interferometry", Proc. SPIE 1163, Fringe Pattern Analysis, (20 November 1989); https://doi.org/10.1117/12.962792
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