| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a primary coated optical fiber excellent in side pressure properties while controlling the variation of the coating diameter to≤0.5μm even in a high speed spinning at a linear velocity of >2,000 m/min. SOLUTION: A melt-spun primary optical fiber is coated with a resin to obtain the primary coated optical fiber. When the primary coated optical fiber is coiled via a turn pulley 21, the vibration of the turn pulley 21 is reduced to be≤13μm. Further, the eccentricity of the turn pulley 21 is reduced to be c×r<SP>2</SP>≤4×10<SP>4</SP>äwhere c(μm) is the eccentricity and r(rpm) is the number of revolution}. COPYRIGHT: (C)2004,JPO&NCIPI
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