| 摘要 |
PURPOSE:To bend at an acute angle in the tip part by packing an optical hardening plastic having flexibility in the vicinity of the boundary of a sticking part and a flexible part, irradiating light to a necessary part of this packed part, and hardening only the limited part. CONSTITUTION:A lot of optical fibers 32 are stuck as one body in an end part 38 by an acid-soluble glass 38a. An optical hardening plastic 33a having flexibility is filled in a boundary part of the end part 38 and a flexible part 39, and other part than the boundary part 40 of the end part and the flexible part is covered with a light shielding member 35. Subsequently, the filled plastic 33a of the boundary part 40 is hardened by irradiating an ultraviolet ray by a light source 37. In this way, the outside circumference of the boundary part to which the largest stress is applied in case of bending is reinforced, and also sufficient flexibility can be provided to the tip part. |
