Patent ID: 11892700
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
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.