Out-of-plane displacement derivative measurement: comparison of results obtained by a shearographic interferometer using the separation of the polarization states and the finite element method

Vanessa Rosso; Lihong Zhang; Fabrice Michel; Yvon Renotte; Yves Lion; Anne-Marie Habraken

doi:10.1117/12.707948

8 September 2006 Out-of-plane displacement derivative measurement: comparison of results obtained by a shearographic interferometer using the separation of the polarization states and the finite element method

Vanessa Rosso, Lihong Zhang, Fabrice Michel, Yvon Renotte, Yves Lion, Anne-Marie Habraken

Author Affiliations +

Proceedings Volume 6343, Photonics North 2006; 634327 (2006) https://doi.org/10.1117/12.707948
Event: Photonics North 2006, 2006, Quebec City, Canada

Abstract

An original experimental setup for shearography with metrological applications is presented herein. The simplicity and the efficiency of the setup are provided by a shearing device, a prism that separates the TE and TM polarization modes with a coating and a thin glass plate attached on its face. The temporal phase shifting method is applied through the use of a liquid crystal variable retarder. The use of this shearing device enables an in-line and almostcommon path configuration for the shearing interferometer, a path that leads to high stability of the interferometer and a low sensitivity to external disturbances. In order to prove the efficiency and the accuracy of this speckle shearing interferometer, the out-of-plane displacement derivative relative to the shearing interferometry direction of a centrally loaded steel plate has been measured by the shearographic interferometer and then compared with the out-of-plane displacement derivative computed from the displacement field provided by the finite element method. The results are in good agreement.

Citation Download Citation

Vanessa Rosso, Lihong Zhang, Fabrice Michel, Yvon Renotte, Yves Lion, and Anne-Marie Habraken "Out-of-plane displacement derivative measurement: comparison of results obtained by a shearographic interferometer using the separation of the polarization states and the finite element method", Proc. SPIE 6343, Photonics North 2006, 634327 (8 September 2006); https://doi.org/10.1117/12.707948

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