Patent ID: 7717566
Filing Date: 2010-05-18
Classification: G03B

Abstract:
1. A light source unit comprising: a plurality of light sources of different wavelengths; and a dichroic prism which is formed substantially into a cubical shape which has a plurality of incident surfaces which correspond to the plurality of light sources, respectively, and an emitting surface so as to combine light rays from the respective light sources for emission therefrom, wherein filters are formed on the incident surfaces which do not face the emitting surface of the dichroic prism, wherein the filters let light of wavelengths corresponding, respectively, to the light sources which the filters face pass through and reflect light of all other wavelengths, and wherein a reflection filter which reflects light of a predetermined color to a required location or a mirror surface which reflects light in such a manner as to be oriented towards an interior of the dichroic prism is formed on surfaces other than the incident surfaces and the emitting surface of the dichroic prism.