| 摘要 |
<p>PURPOSE:To achieve a higher current detection sensitivity, by making the propagation of a light wave opposite in the direction between magnetooptic elements passing through the magnetooptic elements arranged sandwiching a planar conductor. CONSTITUTION:Light wave turned to a parallel beam with a rod lens 27a is made incident into a polarizer 28 to turn the polarization plane thereof with a magnetooptic element 29a in proportion to the intensity of a magnetic field generated by a current to be measured and then, enters a total reflection mirror 30. Light incident into a second magnetooptic element 29b from the mirror 30 is opposite in the direction to the propagation of the light wave through the first element 29a. As a magnetic field generated by the current being measured is also opposite in the direction, the turning of the polarization plane by the element 29b becomes the same in the direction and angle as that by the element 29a. This allows the doubling of an angle of rotation in the polarization plane by the current being measured thereby enabling measurement of current accurately with a higher current detection sensitivity.</p> |
