| 摘要 |
<p>PURPOSE:To facilitate integration of a high-permeability material with a magnetooptical material. CONSTITUTION:A magnetic flux catching part 21 and a magnetic fluid 23 catch a generated magnetic field and transmit the caught magnetic field to a magnetooptical element 22 held by magnets 24 for a bias magnetic field between. Besides, a linearly-polarized light is cast on the magnetooptical element 22 from a light source 31 and the light subjected to the rotation of a plane of polarization corresponding to the magnetic field intensity of a detective magnetic field H is inputted to a polarization plane rotation detecting part 32. A signal processing part 33 conducts a signal processing by photoelectric conversion for determining the intensity of the magnetic field on the basis of the angle of the rotation of the plane of polarization determined by the polarization plane rotation detecting part 32, and as for a signal after the conversion, a conversion part 34 calculates a necessary current value I therefrom on the basis of the magnetic field intensity.</p> |
