Abstract
A method for using an image digitizing system with a minicomputer to automatically determine surface-displacement fields by evaluating holographic fringe patterns is presented. The problem of determining the sign of the displacement vector as well as the need to produce a monotonic phase change across the surface under observation is solved by utilizing the method of carrier fringes. A set of programs has been written so that the camera/computer system can view the pattern of deformation-modulated carrier fringes and, with a knowledge of the initial carrier-fringe pattern, draw a profile plot of the deformed surface. The procedure is exemplified with a study of a centrally loaded disk.
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Matthys, D.R., Dudderar, T.D. & Gilbert, J.A. Automated analysis of holointerferograms for the determination of surface displacement. Experimental Mechanics 28, 86–91 (1988). https://doi.org/10.1007/BF02329001
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DOI: https://doi.org/10.1007/BF02329001