| 摘要 |
<p>PURPOSE:To reduce the diameter of a magnetic substance and its weight by a construction wherein ring magnetic substance is provided close to the periphery of a high tension conductor and a magnetic optical effective element is arranged in the gap made in the magnetic substance. CONSTITUTION:A magnetic substance 2 made of a ring-shaped silicon steel sheet, permalloy or the like is arranged in contact with the periphery of a high tension conductor 1 contained in an airtight container. A magnetic optical effective element 3 is provided in the gap made in the magnetic substance 2. Subsequently there are provided a cable guide 42 comprising an optical cable 4, an optical connector 41 and an insulator composed of teflon, and so on for supplying light to the magnetic optical effective element and leading polarized light out of the airtight container. In so doing, because the ring magnetic substance 2 is provided close to the high tension conductor, it is possible to reduce its diameter and weight.</p> |
