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Proceedings Paper

Stroboscopic real-time holographic interferometry with photorefractive crystals applied to modal analysis
Author(s): Marc P. Georges; Philippe C. Lemaire
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Paper Abstract

A breadboard holographic interferometer that uses a photorefractive sillenite crystal under the anisotropic diffraction configuration is presented for application of quantitative vibration measurements. After the hologram of the object at the rest is recorded, a stroboscope is used to observe the stable pattern of the vibrating object and phase-shifting is introduced for quantitative measurements. It is shown that this system can measure modal displacements of objects of typically 25 X 25 cm2 with high accuracy by using a continuous YAG laser emitting 490 mW at 532 nm. The error sources are investigated and particularly a systematic error arising from the stroboscopic process can be calculated and eliminated.

Paper Details

Date Published: 17 September 1997
PDF: 10 pages
Proc. SPIE 3098, Optical Inspection and Micromeasurements II, (17 September 1997); doi: 10.1117/12.281166
Show Author Affiliations
Marc P. Georges, Univ. de Liege (Belgium)
Philippe C. Lemaire, Univ. de Liege (Belgium)

Published in SPIE Proceedings Vol. 3098:
Optical Inspection and Micromeasurements II
Christophe Gorecki, Editor(s)

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