| 摘要 |
PURPOSE:To improve visibility by obtaining good illumination patterns. CONSTITUTION:A fixed reflector 2 which is fixed to a bulb 8 and formed with a parabolic reflector plane 12 nearly under an optical axis CL and a moving reflector 1 which is pivotally attached to the fixed reflector 2 so as to be displaced toward the optical axis CL at a preset stroke (XY) and formed with a parabolic reflector plane 11 nearly above the optical axis CL are provided behind the bulb 8 with a single light source set up on the optical axis CL. A shade 13 is fixed to the moving reflector 1 so that, when the moving reflector 1 is displaced backward (Y), direct light from the bulb 8 tending to areas 15, 16 special for general travelling beam in the moving reflector 1 can be cut off. |
