| 摘要 |
PURPOSE: To facilitate the degree of free of wall material selection and a sure and geometric fixation of position by permitting a bush to extend through a housing wall and to be hermetically sealed. CONSTITUTION: A light guide tube 3 is connected to an opto-electronic device 9 and surrounded by a plastic protecting layer 13 in a passage part 11 from a device 1 to an outside. The light guide tube 3 is guided through the bush 15 and is provided with the part 23 without having the protecting layer 13 in the bush. The glass-made light guide tube 3 is hermetically sealed by glass 27 received by the bush 15 in the first seal area 25 of the bush 15. In this case, the light guide 3 is freely moved inside a housing and it is unnecessitated that a radius is much reduced in a bending part so as to reduce a light loss as much as possible. |
