Abstract
Optical methods of shadow and projection moire are particularly suitable for mapping the absolute shape of a given surface or the difference between that surface and a master one or its accidental shape change. Essentially, product moire fringes are obtained on an image plane where a filter grating analyzes the image of the test surface which has been coded by projecting a master grating on it. The article resumes the theory in a unifying approach and presents a comprehensive list of applications.
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