| 摘要 |
PURPOSE:To finish an end surface of an optical fiber into a specular surface and to obtain a superior photodonductor by projecting the tip of a plastic optical fiber slightly from an end surface of a cylindrical body of a heat-resisting material and engaging it, and heating the effective surface of the end surface while moving it relatively to a heating means so that a fiber core material is foamed. CONSTITUTION:The protection material 12 atop the plastic optical fiber 1 is removed to project the tip of the core material 11 slightly from the effective surface 21 of the cylindrical body 2 made of the heat-resisting material, and the tip is fixed. A cut part 22 is preferably formed on the side of the effective surface 21. Then when the cylindrical body 2 is turned upward and heated with, for example, flame 3 as shown by an arrow (a), the contacting temperature is held above 300 deg.C and the cylindrical body is heated for about one second. Consequently, the fiber 2 is expanded radially in a short time and its end surface is finished into a specular surface, thereby obtaining a photoconductor which is fixed to the cylindrical body 2 with good adhesive strength. |
