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|Title:||Determining the optimum image recording conditions in shearography based on spatial frequency considerations||Authors:||Chau, Fook S.
|Issue Date:||1993||Citation:||Chau, Fook S.,Ng, Tuck-Wah (1993). Determining the optimum image recording conditions in shearography based on spatial frequency considerations. Proceedings of SPIE - The International Society for Optical Engineering 1821 : 15-26. ScholarBank@NUS Repository.||Abstract:||The transmission function of a double-exposure shearing specklegram consists of fringe- bearing and non-fringe bearing components. To obtain interference fringes, spatial filtering is performed on the processed specklegram to allow only the fringe-bearing components to pass. The spatial frequency for filtering is often determined on a trial-and-error basis. In this paper, a technique is presented to obtain a spectral distribution from which the optimum spatial filtering frequency can be deduced. Knowledge of the optimum spatial filtering frequency to recording aperture relationship enables better selection of image recording conditions.||Source Title:||Proceedings of SPIE - The International Society for Optical Engineering||URI:||http://scholarbank.nus.edu.sg/handle/10635/74981||ISBN:||0819410225||ISSN:||0277786X|
|Appears in Collections:||Staff Publications|
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