| 摘要 |
PROBLEM TO BE SOLVED: To obtain the optical transmission body which has excellent bending capacity transmission characteristic even though the diameter of a core is larger than a specific value, by forming the core with the composition of cross-linking polymer and low molecular bodies. SOLUTION: The optical transmission body consists of a core 1, which is made of the organic material that is transparent and has a certain optical refractive index, and a clad 2, which is provided on the outer peripheral of the core 1 and is made of the organic material having a low refractive index. The core 1 is formed from the composition of cross-linking polymer and low molecular bodies. To maintain good optical and the heat resistance characteristics of the clad 2, it is desirable to use polytetrafluoroethylene and tetrafluoroethylene/hexafluoropropylene double common polymerized bodies. It is also desirable to select the range of an outer diameterϕof the core 1 to be within 3 to 30 mm. If the core diameter is less than 3 mm, no difference in the bending capacities is obtained between the optical transmission body above and the synthetic resin optical transmission body made by coating the peripheral of a conventional synthetic resin core with the clad of fluorinated resin. If the diameter of the core 1 becomes more than 30 mm, the bending capability is greatly reduced. |
