THICKNESS DEVIATION MEASUREMENT METHOD OF OPTICAL FIBER, THICKNESS DEVIATION MEASUREMENT INSTRUMENT OF OPTICAL FIBER, METHOD OF MANUFACTURING OPTICAL FIBER, APPARATUS FOR MANUFACTURING OPTICAL FIBER

摘要

PROBLEM TO BE SOLVED: To provide a thickness deviation measurement method of an optical fiber and a thickness deviation measurement instrument of an optical fiber, which enable lengthwise-direction variance in thickness deviation of an optical fiber coating to be accurately measured with simple configuration, and to provide a method of manufacturing an optical fiber, and an apparatus for manufacturing an optical fiber.SOLUTION: It is determined whether thickness deviation of an ultraviolet curable resin 2 of an optical fiber F varies or not on the basis of an optical detection signal S1 obtained by detecting ultraviolet light U with which the ultraviolet curable resin 2 is irradiated to be cured and which propagates in the ultraviolet curable resin 2 and is scattered to the outside.