Patent ID: 6799874
Filing Date: 2004-10-05
Classification: F21S,F21V,F21W

Abstract:
A headlamp that is installed at the front of an automobile and that illuminates a road surface and the like, whereinthe headlamp comprises a light source, a main reflector, and a sub reflector, and when the light source is turned on, the headlamp reflects the light from the light source with the main reflector and the sub reflector to illuminate the road surface and the like in a target luminous intensity distribution pattern, and changes the luminous intensity distribution pattern by moving the sub reflector, the main reflector and the sub reflector are prepared based on a composite combination of reflection surfaces of free curved surfaces, and the sub reflector is movably disposed at a position where the light from the light source is directly incident to the sub reflector, and also at the position where the sub reflector does not interrupt a light path through which the light from the light source is incident to the main reflector, wherein the main reflector and the sub reflector are disposed in such a relationship when the sub reflector moves and is located at a position other than a first position, a part of the sub reflector is hidden at the backside of the main reflector, and the light from the light source is not incident to the hidden portion of the sub reflector.