Patent ID: 6076376
Filing Date: 2000-06-20
Classification: C03B,C03C,G02B

Abstract:
An optical fiber manufacturing method comprising:drawing an optical fiber from an optical fiber preform;coating said optical fiber with a predetermined coating material; andimparting a predetermined twist to said optical fiber coated with said predetermined coating material, this twist imparting step comprising the steps of:guiding said optical fiber coated with said predetermined coating material with a first guide roller that swings periodically, and rolling said optical fiber on a roller surface of said first guide roller in accordance with swing of said first guide roller;suppressing responsive motion of said optical fiber, which is caused by the swing of said first guide roller, with an optical fiber responsive motion suppressing portion provided on a preceding stage of said first guide roller; andguiding said optical fiber that has passed through said first guide roller to a second guide roller having a fixed rotating shaft and suppressing said optical fiber from rolling on a roller surface of said second guide roller with an optical fiber rolling suppression portion provided to said second guide roller;wherein said optical fiber responsive motion suppressing portion is at least one pair of guide rollers which are provided above said first guide roller at a predetermined distance to oppose each other at a predetermined gap through which said optical fiber is passed.