Patent ID: 8007133
Filing Date: 2011-08-30
Classification: G02B,G03B,G03H

Abstract:
1. A light source device adapted to generate an illumination light beam for illuminating an illuminated surface, comprising: a light source adapted to emit a light beam; a light path conversion member adapted to rotate around an axis perpendicular to a center axis of the light beam emitted from the light source to convert a light path of the light beam emitted from the light source; an overlapping illumination element adapted to overlap a light beam emitted from the light path conversion member on the illuminated surface, the overlapping illumination element having an entrance position on its surface for the light beam transmitted through the light path conversion member that varies in time in accordance with the rotation of the light path conversion member, wherein the illumination element illuminates the same area independent of the entrance position of the light beam; and a rotating element adapted to rotate the light path conversion member.