| 摘要 |
Luminous signalling device (1) comprising one or more light tubes (8) and focusing means (2, 3, 4, 5, 6, 7) for focusing a light beam, these means being capable of focusing a light beam coming from said light tube(s), said means for focusing a light beam comprising several cylindrical lenses (2, 3, 4, 5, 6, 7), each cylindrical lens having a longitudinal axis lying parallel to a straight section (9, 10, 11) of said light tube, characterized in that said straight sections (9, 10, 11) are oriented in several directions around a predetermined azimuthal axis (A), the number and the orientation of said straight sections being chosen so that the light beams coming from said straight sections and focused by said cylindrical lenses (2, 3, 4, 5, 6, 7) are directed in all azimuthal directions about said azimuthal axis. |
