Patent ID: 9223194
Filing Date: 2015-12-29
Classification: F21V,G02B,G03B

Abstract:
1. An illumination light beam forming device, comprising: a first light source unit including corresponding light sources, the first light source unit projecting a ring shaped light beam group, a second light source unit including corresponding light sources, the second light source unit projecting light beams, the light beams from the second light source unit being a light beam group, a combining unit for combining the light beam group projected from the first light source unit and light beams projected from the second light source unit, wherein the combing unit includes a reflecting part formed to reflect one of the light beam groups, a transmitting part disposed able to transmit the other one of the light beam groups, and light beams projected from the second light source unit are disposed at an internal side of the light beam groups projected from the first light source unit when the two light beam groups are viewed from a plane including the reflecting part, wherein when the two light beam groups are viewed from a plane including the reflecting part, the ring shaped light beam group is disposed at a periphery encircling the light beam group of the second light source.