G - Physics – 02 – B
Patent
G - Physics
02
B
88/97.1
G02B 5/14 (1980.01)
Patent
CA 1124561
A B S T R A C T An optical communication cable for the transmission of light comprises one or more than one optical cable element housed in a flexible tube of insulating material, the bore of the tube having regard to the cross-section of the or each element being such that at least one elongate space is formed between the element or elements and the tube. The or each optical cable element comprises an extruded elongate body of insulating material having a bore in which is loosely housed at least one optical fibre having a diameter less than that of the bore. The bore has a smooth continuous boundary wall and is of uniform transverse cross-section throughout its length. To provide reinforcement for the element, two separate elongate reinforcing members are embedded in the extruded body throughout its length and are arranged on opposite sides of and parallel to the bore. The or each optical cable element may be loosely housed in the tube or it may be bonded to or integral with the wall of the tube. As compared with optical communication cables hitherto proposed, the optical cable is simple and inexpensive and because limited movement of the optical fibre can take place within the optical cable element, there is substantially less risk of fracture of or damage to the optical fibre during manufacture and installation of the cable.
374900
Dean Noel S.
Lea Frank
Barrigar & Moss
Bicc Limited
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