Real-Time Phase Detection For Fringe-Pattern Analysis Using Digital Signal Processing

Junichi Kato; Toshio Tanaka; Shigeo Ozono; Keiichi Fujita; Masahiko Shizawa; Kiyoshi Takamasu

doi:10.1117/12.969207

7 June 1989 Real-Time Phase Detection For Fringe-Pattern Analysis Using Digital Signal Processing

Junichi Kato, Toshio Tanaka, Shigeo Ozono, Keiichi Fujita, Masahiko Shizawa, Kiyoshi Takamasu

Proceedings Volume 1032, 18th Intl Congress on High Speed Photography and Photonics; (1989) https://doi.org/10.1117/12.969207
Event: 18th International Congress on High Speed Photography and Photonics, 1988, Xi'an, Shaanxi, China

Abstract

A real-time phase detection method is proposed for restoring three-dimensional profile from fringe patterns generated by deformed grating method or interferometry. The method uses the digital signal processing technique, DPLL(digital phase-locked loop), for extracting the phase distribution directly from the video signal of fringe image. This method is easy to apply to practical measurements and vision systems which need a fast information processing capability, because the phase distribution can be extracted in video-rate with high accuracy and it is suited to a computer base system. The principles and the experimental results are presented in this paper.

Citation Download Citation

Junichi Kato, Toshio Tanaka, Shigeo Ozono, Keiichi Fujita, Masahiko Shizawa, and Kiyoshi Takamasu "Real-Time Phase Detection For Fringe-Pattern Analysis Using Digital Signal Processing", Proc. SPIE 1032, 18th Intl Congress on High Speed Photography and Photonics, (7 June 1989); https://doi.org/10.1117/12.969207

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