| 摘要 |
PURPOSE:To obtain a high moistureproofing effect and to reduce the number of parts by airtightly sealing optical parts in an unpermeable case. CONSTITUTION:An optical parts 7 such as an optical branching filter is inserted into the unpermeable case made of a glass tube or the like and an optical fiber part of the optical parts 7 is fixed by moistureproofing resin 11 such epoxy resin near the opening end of the case 8. Since the optical parts 7 can be completely shielded from outside air, a high moistureproofing effect can be obtained. In addition, the insertion and fixing operation is simple, the parts can be stored only by one case, so that the number of parts can be reduced. |
