Patent ID: 8634120
Filing Date: 2014-01-21
Classification: F21K,F21V,F21Y,G02B,G02F,H04N

Abstract:
1. An illumination device comprising; a first and a second light source wherein the light from the first light source and the second light source are pulsed out of phase; a condenser lens in series with the first and the second light sources wherein the condenser lens directs light from the first light source and the second light source into a light input port at a first and a second incidence angle respectively; and a grating device in series with the condenser lens, wherein the grating device comprises at least one Bragg grating, the light input port and a light output port and the grating device is operative to diffract light from the first light source and the second light source out of the light output port in a common direction.