| 摘要 |
PURPOSE:To obtain a desired light distribution property of a multiple optical axis reflector while reducing contribution of a front lenscut by forming a reflector by means of plural rotating paraboloids which use the same light source as their focuses and which have respective different optical axes. CONSTITUTION:A reflector 1 is formed by e.g. four rotating paraboloids 2, 3, 4, 5, and each of the paraboloids uses a common filament 6 as its light source and the filament 6 is positioned at the focus of each of the paraboloids. The optical axis ZO of the rotating paraboloid (face) 2 serves as the center of the direction of irradiation of the reflector 1, and the optical axis of the paraboloid 3 is inclined downward on the same vertical face as that of the optical axis ZO, and the optical axes of the paraboloids 4, 5 are inclined leftward and rightward, respectively, on the same horizontal face as that of the optical axis ZO. The complementary angle of the reflector to the filament 1 is thereby enlarged downward, and rightward and leftward, and the pattern of a desired T-shaped light distribution property H of the reflector is obtained while the degree of dependence on light diffusion caused by a front lens 7 is reduced. |
