Television cable containing optical fibres - arranged within non-adhesive tubular sheath having relatively large inner diameter

摘要

Televison cable has at least one optical fibre arranged within a tubular sheath having an inner face that does not adhere to the fibres and an inner dia. that is greater than the outer dia. of a single fibre, or the outer dia. of a hypothetical cylinder circumscribing several fibres. Subjects the fibre to low compression and tensile stresses during the flexing of the cable so the fibre is relatively independent of the sheath. Relative slipping mortion between the sheath and fibres is also possible.