| 摘要 |
PURPOSE:To make the securing of the horizontal diffusion and the central light intensity in a light distribution pattern compatible. CONSTITUTION:While light converging areas 3a and 3a making a pair to the left side and the right side as to the main optical axis on a reflecting mirror 1 are provided, the area other than the light converging areas 3a and 3a is made as a light diffusing area 2. The reflected light by the light converging areas 3a and 3a contributes to form a light converging part in the light distribution pattern, while the reflected light by the light diffusing area 2 contributes to form a pattern diffused horizontally in the light distribution pattern. A curved surface design is made to make the horizontal diffusion angle the larger as the more closer to the periphery in the horizontal direction, and the surface form of the light converging areas is made in an elliptical paroboloid form or a rotary paraboloid form. |
