Optical fiber colored core wire

Abstract

The invention provides an optical fiber colored core wire enables a colored layer to be identified easily in darker environments such as at night. The optical fiber colored core wire (1) is characterized in that a plurality of resin layers are wrapped around an optical fiber (13) formed from a fiber core (11) and a cladding (12). In the plurality of resin layers, the outermost resin layer is a colored layer (16) with pigment. The optical fiber colored core wire contains more than one or one pigment agglutinator every 1cm in the length direction. The maximum length of the pigment agglutinators ranges from 3-30 microns.

Description

technical field [0001] The present invention relates to an optical fiber colored core wire, more specifically, relates to an optical fiber colored core wire covered with a multi-layer resin layer around an optical fiber composed of a core and a cladding layer, the multi-layer resin layer Contains the coloring layer. Background technique [0002] An optical fiber used in optical communication has a structure in which a glass fiber composed of a core and a clad is covered with a main layer and a sublayer composed of an ultraviolet curable resin. And, usually, a colored layer to which a colorant is added is formed on the outer peripheral surface of the optical fiber coated with these two layers to constitute an optical fiber core. By providing a colored layer added with a coloring agent, identification of each optical fiber is facilitated. The optical fiber core provided with this colored layer is called an optical fiber colored core wire. [0003] As a colored layer provide...

AI Technical Summary

Problems solved by technology

However, it is difficult to see the colored layer in a dark environment such as at night, so it is not easy to identify the colored core of the optical fiber

At this time, in a darker environment, even if light is irradiated to the colored core wire of the optical fiber, in order to identify the colored layer of the colored optical fiber core wire, it is necessary to irradiate light with a relatively high luminous intensity. Problem to affect visibility in dark place

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