The purpose of this paper is to introduce a new eddy-current testing technique for surface defect detection in nonmagnetic metals using magneto-optic crystal and exciting coil (magneto-optic eddy current probe, MOECP). The magneto-optic eddy current probe could measure the slit depth of the 0.1 mm with the signal-to-noise ratio (SNR) at 16.8 and detect the slit interval with high spacial resolution.
