Patent ID: 9239293
Filing Date: 2016-01-19
CPC Classification: F21V,G01N,G02B

Claim Text:
1. An illuminating device comprising: at least four semiconductor radiation sources for emitting optical radiation in respectively different emission wavelength ranges and along respective beam path segments; at least one color splitter assigned to each of at least three of said semiconductor radiation sources; each of said color splitters being reflective for the optical radiation of the semiconductor radiation source corresponding thereto; at least one of said semiconductor radiation sources having at least one luminescence substance for color conversion; said semiconductor radiation sources and said color splitters being so arranged that the optical radiation emitted by each of said semiconductor radiation sources is coupled into a common illuminating beam path segment; a plurality of collimating units mounted in said beam path segments, respectively, to collimate the optical radiation emitted by corresponding ones of said semiconductor radiation sources and passing to respective ones of said color splitters; wherein at least one color splitter is reflective for the optical radiation of at least two semiconductor radiation sources; a partially transparent deflecting mirror being provided in said common illuminating beam path segment; a monitor detector being arranged to receive light transmitted by said partially transparent deflecting mirror; and, an evaluation unit determining a light intensity reflected by said partially transparent deflecting mirror from a signal received by said monitor detector.