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|Title:||Determining the optimum image recording conditions in shearography based on spatial frequency considerations|
|Authors:||Chau, Fook S. |
|Source:||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|
|Appears in Collections:||Staff Publications|
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