| 摘要 |
PURPOSE:To obtain a flexible light guide having plural light guides cheaply and at high work efficiency by forming a light guide by filling a rubberlike elastic transparent material in the space of a flexible hollow tubular body having closed space. CONSTITUTION:This is provided with a flexible hollow tubular body 1 having at least one closed space and a rubberlike elastic transparent material 2 that fills into the inside of the space, and the light guide part is formed by the transparent material 2. The hollow tubular body 1 is relatively transparent and flexible, and the refractive index is lower than that of the transparent material. This can be obtained, for instance, by extruding a thermoplastic resin such as fluororesin, etc. It is desirable to provide an intermediate layer 3 made of material having a lower refractive index than that of the transparent material 2 to deal with inside flaws and surface soil caused by extrusion of the hollow tubular body 1. Then, the liquid transparent material is injected and solidified. As forming is made by molding, formability and work efficiency are high. Because of such constitution, flexibility can be maintained even in case of large aperture, and light of different wavelength can be transmitted simultaneously by providing plural light guide sections. |
