JRM Vol.3 No.3 pp. 184-189
doi: 10.20965/jrm.1991.p0184


Automatic Fringe Analysis of Moiré Interferometry

Yasuhiko Arai*, Tadao Kurata* and Shunsuke Yokozeki**

* Department of Mechanical Engineering, Faculty of Engineering, Kansai University, 3-3-35, Yamate-cho, Suita, Oosaka 564, Japan

** Department of Mechanical System Engineering, Faculty of Computer Science and System Engineering, Kyushu Institute of Technology, 680-4, Kawazu, lizuka, Fukuoka 820, Japan

July 3, 1990
November 21, 1990
June 20, 1991

The phase analysis of fringes by applying moiré techniques to the interferometer is well-known. Since this method is based on 2-D subtraction method in the incoherent optics, the distortion of the optical system is easily removed and a large aperture interferometer can be constructed. In this paper, a novel automatic method to detect phase of fringes was proposed by combining the conception of moiré-interferometer with a microcomputer system. The validity of the method is shown by experimental results in the phase analysis of fringes of slide-glasses. Furthermore, this system was applied to the measurement of pressure distributions in a Laval nozzle, and the measured results approximately coincided with the theoretical values. These results suggest that the system is well applicable to the fields of fluid mechanics.

Cite this article as:
Y. Arai, T. Kurata, and S. Yokozeki, “Automatic Fringe Analysis of Moiré Interferometry,” J. Robot. Mechatron., Vol.3, No.3, pp. 184-189, 1991.
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