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Proceedings Paper

Nondestructive testing by digital shearography using a Savart plate
Author(s): F. Michel; P. Blain; E. Auger; Y. Renotte; S. Habraken
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Paper Abstract

Shearography is a growing optical technique in the field of non-destructive testing (NDT)[1],[2]. Hololab developed an out of plane, in line and almost common path interferometer based on polarization states separation using a coated prism for digital phase-shifting shearography[3]. This setup is efficient but does not allow varying the shearing direction that is an important parameter for defects detection[1]and quantification[2]. To overcome this disadvantage, the coated prism is substituted by a Savart plate device that allows scanning several shearing directions by rotating the device around the light propagation axis. The behaviour of the Savart plate as a shearing device is experimentally analyzed to optimize its integration within the interferometer. Recorded phasemaps in NDT for different shearing directions are presented.

Paper Details

Date Published: 4 August 2009
PDF: 8 pages
Proc. SPIE 7386, Photonics North 2009, 73861O (4 August 2009); doi: 10.1117/12.839676
Show Author Affiliations
F. Michel, Univ. de Liège (Belgium)
P. Blain, Univ. de Liège (Belgium)
E. Auger, Univ. de Liège (Belgium)
Y. Renotte, Univ. de Liège (Belgium)
S. Habraken, Univ. de Liège (Belgium)

Published in SPIE Proceedings Vol. 7386:
Photonics North 2009
Réal Vallée, Editor(s)

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