A linear magneto-optical imager for non-destructive evaluation

Jean Pinassaud (1, 2) , Yohan Le Diraison (3, 1, 2) , Pierre-Yves Joubert (1, 3, 2)

1 SATIE - Systèmes et Applications des Technologies de l'Information et de l'Energie
2 SATIE-II - Instrumentation et Imagerie
3 ENS Cachan - École normale supérieure - Cachan

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.

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

Domaines: Sciences de l'ingénieur [physics]

Jean Pinassaud, Yohan Le Diraison, Pierre-Yves Joubert. A linear magneto-optical imager for non-destructive evaluation. International Journal of Applied Electromagnetics and Mechanics, 2007, 25 (1-4), pp.267-305. ⟨hal-00844756⟩