Patent ID: 7073929
Filing Date: 2006-07-11
Classification: F21S

Abstract:
1. A projector-type headlamp comprising: a main reflector that includes a main reflecting surface that is substantially an ellipsoid of revolution having a first focal point and a second focal point; the light source located on or substantially close to the first focal point; a projector lens that projects outward a predetermined light distribution pattern, the projector lens having a third focal point, wherein the projector lens is arranged such that the third focal point is located on or substantially close to the second focal point; a first subreflector with a first sub-reflecting surface that is substantially an ellipsoid of revolution having a fourth focal point and a fifth focal point, wherein the first subreflector is arranged such that the fourth focal point is located on or substantially close to the first focal point, and the first sub-reflecting surface reflects a portion of light output from the light source that usually results in becoming ineffective toward the fifth focal point; a second subreflector with a second sub-reflecting surface that is substantially an ellipsoid of revolution having a sixth focal point and a seventh focal point, wherein the second subreflector is arranged such that the sixth focal point is located on or substantially close to the fifth focal point, and the second sub-reflecting surface reflects light reflected from the first sub-reflecting surface toward the seventh focal point; a third subreflector with a third sub-reflecting surface that is substantially a paraboloid of revolution having an eighth focal point, wherein the third subreflector is arranged such that the eighth focal point is located on or substantially close to the seventh focal point, and the third sub-reflecting surface reflects light reflected from the second sub-reflecting surface toward the outside on a left outer side or a right outer side with respect to the predetermining light distribution pattern.