An optical energy transmission device and a related method includes a flexible fiber optic rod and a flexible sheath surrounding and spaced from the fiber optic rod, with a disc member fixed in edge contact with both the rod and the sheath for supporting and uniformly spacing the rod from the sheath....http://www.google.co.uk/patents/US4819630?utm_source=gb-gplus-sharePatent US4819630 - Flexible light transmissive apparatus and method
