| 摘要 |
PURPOSE:To improve workability, also to shorten a hard part of the tip of an object, and to execute smoothly an inflection by covering an object side and an eyepiece side of a conduit with a thermal contraction tube, setting the object side to the lower side, suspending it in an acid treating tank, and executing an acid elution treatment. CONSTITUTION:Thermal contraction tubes 9, 10 having a prescribed length, respectively, are attached to both end parts of an object side 7 and an eyepiece side 8 of an optical fiber bundle 5 of a welded structure, a suspending tool 11 is fixed to the tubes 9, 10, the object side of the fiber bundle 5 fixed by the suspending tool 11 is set to the lower side and placed in an acid elution tank 12, and an elution treatment is performed to a solvent soluble part of the middle part of the fiber bundle 5. Also, as for the tubes 9, 10, vinyl chloride is used, and the object side 7 is made shorter than the eyepiece side 8. Moreover, a fixing hole of the suspending tool 11 is made at a part of about 5mm. from the tip of the tube 10, and nitric acid is used for a solvent. In this way, the elution treatment is executed extending from the outside circumference of the conduit 5 to the inside, and a hard part 14 of the object tip part is melted almost horizontally and formed shortly. The fiber bundle does not fall out of the tube 10 in the course of the treatment, and also the hard part 14 of the tip of the object side is short, therefore, it can cope smoothly with an inflection, too. |
