| 摘要 |
An optical fiber twisting apparatus that makes it possible to prevent the occurrence of line distortion in an optical fiber as it is undergoing a drawing process and to provide a consistent coating on a bare optical fiber. This optical fiber twisting apparatus is provided with a twist roller apparatus that includes a twist roller that, by imparting a twist to an optical fiber, imparts a twist to a molten portion of an optical fiber preform that is positioned on an upstream side of the optical fiber; and a support portion that supports the twist roller. The accuracy of the outer circumference of the twist roller when the twist roller is forming a part of the twist roller apparatus is 15 µm or less.
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