Patent ID: 8147069
Filing Date: 2012-04-03
Classification: G02B,G02F,G03B,G11B,H04N

Abstract:
1. A lighting device, comprising: a first light source configured to emit light having a first wavelength; a second light source located close to the first light source and configured to emit light having a second wavelength in almost a same direction as that of the first light source; a third light source configured to emit light having a third wavelength and located so as to emit the light in a direction different from that of the first and second light sources; a first coupling optical system configured to couple light from the first and second light sources; a second coupling optical system configured to couple light from the third light source; and a light path synthesizing element configured to synthesize a light path of light from the first, second and third light sources, wherein the light path synthesizing element comprises a first surface and a second surface unparallel with the first surface, and wherein the first surface reflects light from the first light source and transmits light from the second and third light sources, and the second surface reflects light from the second light source and transmits light from the third light source.