Optical fiber production device and optical fiber production method

Abstract

An optical fiber production device includes a drawing furnace configured to melt a glass base material and configured to draw out a drawn glass fiber, a coating unit configured to coat the glass fiber with a resin layer to form an optical fiber, a bottom roller disposed directly below the drawing furnace, the bottom roller being configured to change a running direction of the optical fiber, and a capstan configured to pull the optical fiber. When the bottom roller is viewed from a direction perpendicular to a rotation shaft of the bottom roller a running surface of the bottom roller on which the optical fiber runs is flat or convex, and a width of the running surface is 2 mm or more and 10 mm or less.

Dependencies are inferred from the claim text.