| 摘要 |
<p>PURPOSE:To use a transparent insulating plate having a refracting section for raising current transmission factor and insulation resistance without changing a package in size. CONSTITUTION:A light-emitting element pellet 13 and a light receiving element pellet 12 are fastened on the transparent insulating plate 15 having a rafracting section such as BSG. Thereby, the distance along said insulating plate 15 between said inlet side pellet 13 and outlet side pellet 12 is increased, the insulation resistance between input and output is raised, and a package does not differ in size from a flat transparent insulating plate.</p> |
