AN OPTICAL DEVICE FOR PRODUCING HIGH BRIGHTNESS LIGHT

摘要

An optical device (220) is provided. The optical device (220) comprises a light converting member (226) arranged to at least party convert incoming light of a first wavelength into light of a second wavelength, to emit light of the second wavelength, and to reflect at least a part of the light of the first wavelength; and a light guide (222) comprising a light entrance (223) and a light exit (224), the light guide (222) being arranged to guide incoming light of the first wavelength from the light entrance (223) to the light converting member (226) and to guide light emitted and/or reflected from the light converting member (226) to the light exit (224). The light converting member (226) and the light exit (224) are at opposite surfaces of the light guide (222). The light converting member (226) and the light exit (224) are arranged along a main optical axis (OA) of the light guide (222), and the light entrance (223) is arranged at a geometrical envelope surface (221) surrounding the main optical axis (OA) of the light guide (222).