| 摘要 |
PURPOSE:To prevent faults such a blister and failure of a soln. type light transmission hose by the effect of heat by using halogen base hydrocarbon as a liquid core. CONSTITUTION:Carbon and halogen element or further the carbon and halogen element which contain oxygen and have the refractive index higher than the refractive index of a flexible tubular body 1 are used as the liquid core 2. The heat is thereby particularly accumulated in the boundary region A where a window material 3 comes into contact with the liquid core 2 when the solar ray condensed by a large-aperture diameter lens is projected on the window material 3. The generation of the blister, failure, etc., in the flexible tubular body 1 is thus obviated. |
