SEDL / STP / STP1323-EB / STP42146S

Real-time Phase Analysis Methods for Analyzing Shape, Strain and Stress

Morimoto, Yoshiharu
Professor, Faculty of Systems Engineering, Wakayama University, Wakayama,

Fujigaki, Motoharu
Research Associate, Faculty of Systems Engineering, Wakayama University, Wakayama,

Pages: 16    Published: Jan 2001

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Abstract

To analyze phase distributions of grating and fringe patterns in real-time, several methods were proposed by many researchers. In this paper, four methods to measure shapes of three-dimensional objects developed by the authors are shown. The first is a phase-shifting scanning moire method. The second is a phase-difference scanning moire method. The third is a phase-shifting method using the correlation of the rectangular brightness of a projected grating and two rectangular functions. The last is an integrated phase-shifting method. These methods can provide accurate phase distributions of grating lines and fringe lines in real-time.

The principles of these methods and applications to measure shape, strain and stress analysis are shown.