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Optical Engineering

Moiré topography for three-dimensional profile measurement using the interference fringes of a laser
Author(s): Tetsuya Matsumoto; Yoichi Kitagawa; Masaaki Adachi; Akihiro Hayashi
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Paper Abstract

Resolution-variable moiré topography for measuring the three-dimensional profile of an object is described. With this method, moiré fringes are formed by projecting two sets of interference fringes of laser beams on an object. The interference fringes are formed using a Mach-Zehnder interferometer and are divided into two sets by a beamsplitter. The image, including the moiré fringes, which are formed in accordance with the object depth, is detected by an image sensor. The effectiveness of this method is demonstrated by practically measuring the profiles of a small object. The intervals between adjacent moiré fringes could be experimentally changed from 0.16 to 1.6 mm. The advantage ofthis method is that the interval between moiré fringes can be easily changed continuously by a mechanical operation.

Paper Details

Date Published: 1 December 1992
PDF: 6 pages
Opt. Eng. 31(12) doi: 10.1117/12.60019
Published in: Optical Engineering Volume 31, Issue 12
Show Author Affiliations
Tetsuya Matsumoto, Hyogo Prefectural Institute of Industrial Research (Japan)
Yoichi Kitagawa, Hyogo Prefectural Institute of Industrial Research (Japan)
Masaaki Adachi, Kanazawa Univ. (Japan)
Akihiro Hayashi, Kobe City College of Technology (Japan)

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