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Optical Engineering

Combining shearography and interferometric fringe projection in a single device for complete control of industrial applications
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Paper Abstract

Noncontact optical measurement methods are essential tools in many industrial and research domains. A family of new noncontact optical measurement methods based on the polarization states splitting technique and monochromatic light projection as a way to overcome ambient lighting for in-situ measurement has been developed. Recent works on a birefringent element, a Savart plate, allow one to build a more flexible and robust interferometer. This interferometer is a multipurpose metrological device. On one hand the interferometer can be set in front of a charge-coupled device (CCD) camera. This optical measurement system is called a shearography interferometer and allows one to measure microdisplacements between two states of the studied object under coherent lighting. On the other hand, by producing and shifting multiple sinusoidal Young’s interference patterns with this interferometer, and using a CCD camera, it is possible to build a three-dimensional structured light profilometer.

Paper Details

Date Published: 9 August 2013
PDF: 8 pages
Opt. Eng. 52(8) 084102 doi: 10.1117/1.OE.52.8.084102
Published in: Optical Engineering Volume 52, Issue 8
Show Author Affiliations
Pascal Blain, Univ. de Liège (Belgium)
Fabrice R. Michel, Univ. de Liège (Belgium)
Pierre Piron, Univ. de Liège (Belgium)
Yvon L. Renotte, Univ. de Liège (Belgium)
Serge Habraken, Univ. de Liège (Belgium)

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