INTEGRATOR AND OPTICAL UNIT USING THE SAME

摘要

An integrator (21) collects and guides light inputted from alight source (11) by a light guiding body having a light entering surface (21a) and a light outgoing surface (21b), and outputs the light as a surface light source having uniform light intensity distribution within a specific range in a specific direction. In the light guiding body, the area of the light outgoing surface (21b) is larger than that of the light entering surface (21a), and a beam angle converting means for converting the maximum outgoing light angle of outgoing light to be smaller than the maximum entering light angle of entering light is formed.