Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/74981
Title: Determining the optimum image recording conditions in shearography based on spatial frequency considerations
Authors: Chau, Fook S. 
Ng, Tuck-Wah 
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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