| 摘要 |
PURPOSE:To improve the brightness of the illumination light by utilizing the whole reflected light from a reflector. CONSTITUTION:A reflector 12 is split-constituted of an upper reflector 16 and a lower reflector 17. The upper reflector 16 is formed into a composite elliptic paraboloid having an elliptic curve with focal points F1, F2 on the center vertical cross section, and the lower reflector 17 is formed into a composite paraboloid having an elliptic curve with focal points F1, F3 on the center vertical cross section. The light fed to a convex lens 15 via the focal point F1 is radiated as the horizontal light from the convex lens 15, and the light fed to the convex lens 15 via the upper side of the focal point F1 is radiated from the convex lens 15 as the downward light lower than the horizontal light. |
