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Proceedings Paper

Coordinate transform method for closed fringe analysis
Author(s): Zongtao Ge; Fumio Kobayashi; Shinichi Matsuda; Mitsuo Takeda
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Paper Abstract

A coordinate transform method is proposed which enables the Fourier transform method to analyze interferograms including closed fringe patterns. According to the principle of the proposed method, closed fringe patterns in an interferogram can be converted to open fringe patterns by transforming the Cartesian coordinate system to a polar coordinate system. Phases corresponding to the open fringe interferograms can be obtained by analyzing the open fringe interferograms using the conventional Fourier transform method. Subsequently, the original phases corresponding to the closed fringe interferograms can be acquired by inverse coordinate transform. Computer simulation and experiments show that spherical wave fronts are accurately recovered by using the proposed method.

Paper Details

Date Published: 7 March 2006
PDF: 9 pages
Proc. SPIE 4101, Laser Interferometry X: Techniques and Analysis, (7 March 2006); doi: 10.1117/12.498424
Show Author Affiliations
Zongtao Ge, Fuji Photo Optical Co., Ltd. (Japan)
Fumio Kobayashi, Fuji Photo Optical Co., Ltd. (Japan)
Shinichi Matsuda, Fuji Photo Optical Co., Ltd. (Japan)
Mitsuo Takeda, Univ. of Electro-Communications (Japan)

Published in SPIE Proceedings Vol. 4101:
Laser Interferometry X: Techniques and Analysis
Gordon M. Brown; Malgorzata Kujawinska; Werner P. O. Jueptner; Ryszard J. Pryputniewicz; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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