A linear magneto-optical imager for non-destructive evaluation

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Joubert, Pierre-Yves^{a; *} | Diraison, Yohan Le^a | Pinassaud, Jean^a

Affiliations: [a] SATIE, CNRS – 8029, Ecole Normale Supérieure de Cachan, 61 avenue du président Wilson, 94 235 Cachan Cedex, France

Correspondence: [*] Corresponding author. Tel.: +33 1 47 40 55 90; Fax: +33 1 47 40 21 99; E-mail: joubert@satie.ens-cachan.fr

Abstract: An integrated prototype of a new linear magneto-optical imager dedicated to real time inspection of large planar metallic structures is presented. The system provides images of the resulting normal magnetic field at the surface of the inspected structure, in amplitude and phase, in order to enable full defect characterization such as 3D image inversion. First raw images were obtained with an integrated linear magneto-optical imager, during the inspection of a flawed riveted lap joint mock-up similar to actual aeronautical structures.

Keywords: Non-destructive evaluation, real time imaging, magneto-optical imaging, eddy currents, defect detection and characterization, magneto-optical garnet, Faraday effect, riveted lap joints inspection

DOI: 10.3233/JAE-2007-831

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 297-305, 2007