Eur. Phys. J. Appl. Phys.
Volume 35, Number 2, August 2006
|Page(s)||145 - 148|
|Section||Instrumentation and Metrology|
|Published online||12 July 2006|
Metrological analysis of shearography*
Laboratoire Central des Ponts et Chaussées, 58 boulevard Lefebvre, 75732 Paris Cedex 15, France
Corresponding author: email@example.com
Revised: 22 November 2005
Accepted: 17 April 2006
Published online: 12 July 2006
This paper presents an uncertainty budget of measurement on the optical phase on the basis of a metrological analysis inspired from the “GUM” approach [GUM, Guide to the expression of Uncertainty in Measurement (ISBN 92-67-20188-9, 1993)]. This budget takes account of the procedure implemented in calibrating the phase-shifting device and in the actual phase measurement. This study leads to deriving an estimation of the standard uncertainty in measuring the optical path difference at approximately . This value agrees with a purely experimental estimate [F. Taillade, Association de la shearographie et des ondes de Lamb pour la détection rapide et quantitative des délaminages, Ph.D. thesis, Technical Note ONERA, NT 2001-3, 2001], which led to a standard uncertainty of roughly .
PACS: 06.20.-f – Metrology / 42.30.-d – Imaging and optical processing / 42.30.Ms – Speckle and moire patterns
© EDP Sciences, 2006
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