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Proceedings Paper

Shadow moire by phase shifting method and applications
Author(s): Gerard Mauvoisin; Fabrice J. Bremand; Alexis Lagarde
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Paper Abstract

The shadow moire is one of the optical techniques which is able to give level lines of an object with respect to a master grating plane. Level lines result from the interferences between the lines of the master grid and their shadow projected by a ponctual source light. The sensitivity of this procedure is a few tenths of millimeters in best cases. A complete study is presented showing the influence of the different parameters. It is shown that only one possibility is available. We then propose an automated procedure based on a 2D FFT algorithm to determine precisely the phase shift value introduced by a coarse object translation. Finally, the presented applications on 3D shape reconstruction and out-of-plane displacement field measurement show the potentiality of shadow moire is greatly improved with an accuracy of 0.02 mm.

Paper Details

Date Published: 15 March 1994
PDF: 12 pages
Proc. SPIE 2065, Optics, Illumination, and Image Sensing for Machine Vision VIII, (15 March 1994); doi: 10.1117/12.169362
Show Author Affiliations
Gerard Mauvoisin, Univ. de Poitiers (France)
Fabrice J. Bremand, Univ. de Poitiers (France)
Alexis Lagarde, Univ. de Poitiers (France)

Published in SPIE Proceedings Vol. 2065:
Optics, Illumination, and Image Sensing for Machine Vision VIII
Donald J. Svetkoff, Editor(s)

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