| 摘要 |
In order to solve the problems in a headlamp which a prior discharge lamp or the like is provided as a light source, a headlamp in which a right elliptic reflecting surface and a left elliptic reflecting surface are provided on a position toward the front upper of the bulb, a right parabolic reflecting surface is provided on a position toward the lower and right of said main reflecting surface, and a left parabolic reflecting surface is provided on a position toward the lower and left of said main reflecting surface, whereby the light except for the light traveling in an upward direction from the bulb 2 and toward the main reflecting surface can be recovered and to convert into the light which can be used as the irradiating light; a headlamp in which the elliptic reflecting surfaces 6 which captures light emitted upwardly and forwardly from the bulb 2 and parabolic reflecting surfaces 7 which reflect said light to an irradiating direction and are provided on positions which an optical interference with said main reflecting surface 3 is caused are provided, and a light-distribution varying means 10 is provided in the optical path of the parabolic reflecting surfaces, whereby it becomes possible to switch between the light distributions even in the case of using the light source of only one; a headlamp in which the right_and left elliptic reflecting surfaces 6 are provided on a position toward the front upper of the bulb, and the lower reflecting surfaces of the left and right are provided on a position toward the lower of the left and right of the main reflecting surface 3, whereby the utilization factor of luminous flux is improved; and a headlamp in which the main reflecting surface 3a is provided as the upper half portion thereof, auxiliary reflecting surfaces 3b are provided on the left and right of the main reflecting surface 3a, the elliptic reflecting surfaces 6 are provided on the front upper of the light source 2 in the left and right direction, the parabolic reflecting surfaces 7 are provided on the lower of the main reflecting surface 3a, and a movable shield plate 18 is provided on the vicinity of the light source is constituted, whereby the light which heretofore has been used, said light being radiated in an upward direction from the bulb and toward the front is captured by the elliptic reflecting surfaces, and an amount of light is increased; are realized.
|
