Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 29, 2008
Patent Application Number
11520566
Date Filed
September 14, 2006
Patent Primary Examiner
Patent abstract
A light source is movable between a reference position located on an optical axis on the rear side of a rear side focal point of a projection lens and a forward shift position located on the forward side of the reference position. At a predetermined position of the reflecting surface of a reflector on the lower side of the optical axis, an auxiliary reflecting surface having a vertical section of substantially an elliptical shape is formed which has a first focal point set at the center of the light source at the forward shift position, and a second focal point set at the rear side focal point of the projection lens.
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