| 摘要 |
PURPOSE:To improve the radiation efficiency of light in a specific direction and to improve the contrast in an illumination and a non-illumination state by reflecting light which is emitted by a light emitting element almost in parallel to the center axis of a concave reflecting surface by nearly the lower half surface of the concave reflecting surface and also reflecting the light downward by nearly the upper half surface. CONSTITUTION:Nearly the lower half surface when the concave reflecting surface 16 is viewed from the front reflects the light emitted by the light emitting element 1 almost in parallel to the center axis Z of the concave reflecting surface 16 and nearly the upper half surface when the concave reflecting surface 16 is viewed from the front reflects the light emitted by the light emitting element 1 downward. Thus, the light emitted by the light emitting element 1 is reflected by the concave reflecting surface 16 almost in parallel to the center axis Z of the concave reflecting surface 16 and downward and the light emitted by the light emitting element 1 strikes on a hood 2 and is prevented from being radiated except in the specific direction. Consequently, the radiation efficiency of the light in the specific direction is improved and the contrast is improved in the illumination and non-illumination states. |
