| 摘要 |
The device has an enclosure carrying a light conductor (2) such that the light conductor is fixedly mounted in the enclosure by a fixed bearing (3) at a predetermined location. The enclosure is partially formed in a transparent manner, and comprises a smaller thermal expansion coefficient than the light conductor. The predetermined location of the light conductor lies in a middle of longitudinal extension of the light conductor. A light-source (4) is fastened at ends of the light conductor, which is made from polymethyl methacrylate or polycarbonate. |
