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Analysis of the optical reconstruction of shearograms using oblique illumination

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1 Author(s)
Ng, T.W. ; Bachelor’s of Technology Programme, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260

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Oblique illumination has superseded the use of lenses in the optical reconstruction of shearograms. Nevertheless, the mechanism behind this operation has, hitherto, not been clearly elucidated. In this article, we describe this mechanism via the use of ray and wave optics principles. A comparative analysis of the performances using white-light and monochromatic illumination is also furnished. © 1997 American Institute of Physics.

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Review of Scientific Instruments  (Volume:68 ,  Issue: 8 )