| 摘要 |
PURPOSE:To prevent optical tape cores from becoming disordered in array and to secure mechanical characteristics and transmission characteristics by composing a tape type optical fiber core (optical tape core) laminate of an assembly which increases in supply tension toward the center of a rod-shaped spacer successively from an external layer side optical tape core to an internal layer side optical tape core. CONSTITUTION:This high-density spacer unit as an optical fiber unit has the sectional structure composed of center steel wires 1, PE spacers 2, optical tape cores, and pressure tapes 4. Further, each optical tape core 3 is stored as a laminate consisting of plural, e.g. five tapes. The supply tension of the optical tape core 3 is increased to an optical tape core 3 stored nearby the center line of the spacer 2 to reduce the residual strain of each optical tape core 3 after bundling to a small positive value, and consequently the optical tape cores 3 are made hard to become disordered in array and the mechanical characteristics and transmission characteristics are stabilized. |
