Automatic fringe analysis for moiré topography |
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Authors: | T Yatagai M Idesawa |
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Institution: | The Institute of Physical and Chemical Research, 2-1, Hirosawa, Wako, Saitama 351, Japan |
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Abstract: | Two digital systems are developed for the automatic measurement of 3-D shapes using moiré techniques—an automatic 3-D shape measuring system using the scanning moiré method and an interactive fringe analysing system for moiré fringe photographs. In the automatic 3-D shape measuring system, a deformed grating is scanned and sampled with an electronic image scanning device so that moiré fringes are generated in a computer. This technique of electronic fringe generation eliminates ambiguity with regard to the sign of the moiré fringes. The interactive fringe analyser provides a flexible and versatile tool for moiré fringe analysis. Medical applications of these analysing systems are discussed. |
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