CPC G02B 6/4482 (2013.01) [G02B 6/441 (2013.01); G02B 6/4403 (2013.01); G02B 6/448 (2013.01)] | 4 Claims |
1. An optical fiber unit, comprising:
an optical fiber ribbon in which a plurality of optical fibers are arranged in parallel and connected to each other;
a colored bundle tape longitudinally wrapped around an optical fiber ribbon bundle in which a plurality of the optical fiber ribbons are stranded together; and
a colored bundle yarn spirally wound around the optical fiber ribbon bundle and the bundle tape, wherein
the colored bundle tape covers a whole periphery of the optical fiber ribbon bundle in a range of 25% or more and 100% or less,
the colored bundle tape covers a given area of the optical fiber ribbon bundle, and
the given area is 50% or more and 100% or less of the entire circumference of the optical fiber ribbon bundle in a cross sectional view.
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