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Measurement of a transparent object by using an automated Talbot interferometer

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Abstract

It is reported that the first partial derivative of the phase distribution for a transparent object can be measured automatically by a personal computer with an image processor. The moire pattern is formed by superimposing the Fourier image distorted by the transparent object on the master grating. But if only the moire patterns are observed, it is not shown if the fringe order numbers increase or decrease. The fringe scanning method is presented to overcome the fringe order numbers. The four-step method is used to calculate the first partial derivative. By a simple experiment, the first partial derivative can be shown in the three dimensional graphics.

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Authors and Affiliations

  1. Department of Electrical Engineering and Computer Science, Osaha Prefectural College of Technology, 26-12, Saiwai-cho, Neyagawa, Osaha, 572, Japan

    Nobuyuki Shigei

  2. Department of Intelligent Mechanics, Faculty of Biology-Oriented Science and Technology, Kinki University, 930, Nishimitani, Uchita-cho, Naga-gun, Wakayama, 646-64, Japan

    Toshiro Matsumoto

  3. Department of Mechanical System Engineering, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, 680-4, Kawazu, Iizuka, Fukuoka, 820, Japan

    Nobuaki Teshima, Akira Asano & Shunsuke Yokozeki

Authors
  1. Nobuyuki Shigei
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  2. Toshiro Matsumoto
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  3. Nobuaki Teshima
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  4. Akira Asano
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  5. Shunsuke Yokozeki
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Shigei, N., Matsumoto, T., Teshima, N. et al. Measurement of a transparent object by using an automated Talbot interferometer. Optical Review 1, 273–275 (1994). https://doi.org/10.1007/BF03254883

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  • DOI: https://doi.org/10.1007/BF03254883

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