| 摘要 |
In a known form of optical cable comprising a plurality of separately formed tubes of rubber or plastics material in each of at least some of which is loosely housed at least one optical guide comprising at least one optical fibre, the tubes are assembled with at least one separately formed elongate filler having at least a circumferentially continuous layer of compressible "cushioning" material. The assembly of tubes and flexible filler or fillers is surrounded by an outer protective sheath. The tubes may be arranged in one or more than one layer around a central core which may itself be a tube or one or more than one flexible filler. Flexible fillers may also alternate with the tubes in the layer or layers of tubes. The or each filler may be of composite form comprising a core and an outer peripheral layer of "cushioning" material; the core of the composite filler may be a reinforcing member. |
