| 摘要 |
PROBLEM TO BE SOLVED: To easily and accurately manufacture a branched optical fiber bundle in which primary coated optical fibers are evenly distributed and light quantity distribution is uniformized, and the branched ends are different in length. SOLUTION: A bobbin for manufacturing a branched optical fiber bundle is provided with: coiling members 2, 3 having curved surfaces and different shape; a first projection row composed of a plurality of projections 7 arranged on the curved surfaces of the coiling members 2, 3; and a second projection row composed of a plurality of projections 7 arranged on the curved surfaces at positions separated from the first projection row. In a plurality of spaces formed of the projections 7, the primary coated optical fibers are coiled as a plurality of bundles. COPYRIGHT: (C)2005,JPO&NCIPI
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