Detection and Imaging of Magnetic Field in the Low-Frequency Regime Using a Ferromagnetic Thin Film Coated With a Thermo-Fluorescent Layer

A novel and original method of low-frequency magnetic field imaging is presented, that uses a thin film coated with fluorescent dye. Due to high permeability consequent hysteresis losses, the heated by field. As fluorescence material temperature-dependent, mapping can be obtained in short time on large surface recording images an S-CMOS camera. This principle had been previously presented microwave regime, for both electric fields imaging; here, we propose first results regime (kilohertz frequency range).