| 摘要 |
<p>PURPOSE:To obtain an electromagnet generating a high magnetic field between poles by a method wherein a core made of semi-hard magnetic material is placed in a plane containing light paths along which light enters and comes out of a composite optical component including a magneto-optical switching device and holes are drilled in the core, auxiliary pole plates and a magnetic plate for forming a closed magnetic path and coils are wound around the core on the parts apart from the light path. CONSTITUTION:Holes 4a-4c are drilled in a core 1 having a square cross section along single-dotted chain lines A-C which are the light paths of a laser beam. All the holes exist in a plane on which all the centers of the cross sections of the core 1 exist or in a plane which is in parallel with the former plane. Therefore, an electromagnet suitable for surface mounting can be constructed easily. Further, as a core frame can be so designed as to have coils 5 wound on two positions apart from the hole 4c, a high magnetic field can be obtained between poles.</p> |
