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Proceedings Paper

Displacement measurement based on the Moire fringe
Author(s): Xiaoying Li
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Paper Abstract

Moire fringe can be used for measuring the displacement of the object. In this paper, Charge Coupled Device (CCD) is used for capturing the numerical moire fringe, substituting for the usual photodetector. The movable grating is labeled by the special figure, which moves in the moire fringe with the movable grating moving. The original position serves as the reference, and the special figure is searched for in the moire fringe by the correlation operation to determine its shift of pixel in the screen, then by the calibration value to calculate the displacement of the measured object. This method does not need to count the shifting number of the moire fringe. However the lateral magnifying power of lens is considered seriously.

Paper Details

Date Published: 15 November 2011
PDF: 6 pages
Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 832148 (15 November 2011); doi: 10.1117/12.916886
Show Author Affiliations
Xiaoying Li, Beijing Information Science and Technology Univ. (China)

Published in SPIE Proceedings Vol. 8321:
Seventh International Symposium on Precision Engineering Measurements and Instrumentation
Kuang-Chao Fan; Man Song; Rong-Sheng Lu, Editor(s)

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