LIGHT-EMITTING DEVICE
A light-emitting device includes a light source unit including a plurality of laser light sources; a dioptric system that refracts each light ray input from each of the plurality of laser light sources; a condensing optical system that condenses a plurality of refracted light rays input from the dioptric system, respectively, wherein the dioptric system is configured to refract a plurality of center light beams that are output along optical axes of the plurality of laser light sources, respectively, to proceed in directions each departing from an optical axis of the condensing optical system as proceeding toward the condensing optical system.
1 . A light-emitting device comprising:
a light source unit including a plurality of laser light sources;
a dioptric system that refracts each light ray input from each of the plurality of laser light sources;
a condensing optical system that condenses a plurality of refracted light rays input from the dioptric system, respectively,
wherein the dioptric system is configured to refract a plurality of center light beams that are output along optical axes of the plurality of laser light sources, respectively, to proceed in directions each departing from an optical axis of the condensing optical system as proceeding toward the condensing optical system.
2 . The light-emitting device according to claim 1 , wherein the dioptric system includes a plurality of inclined surfaces each having an inclined angle corresponding to each of the plurality of laser light sources.
3 . The light-emitting device according to claim 2 , wherein the plurality of inclined surfaces are provided at at least one of an incident surface and a light exiting surface of the dioptric system.
4 . The light-emitting device according to claim 2 , wherein the dioptric system is a single optical component including the plurality of inclined surfaces.
5 . The light-emitting device according to claim 4 ,
wherein the plurality of inclined surfaces are provided at both of an incident surface and a light exiting surface of the dioptric system, and
wherein the incident surface and the light exiting surface from which a light ray input from the respective incident surface is output are inclined such that a distance therebetween becomes larger as departing from the optical axis of the condensing optical system.
6 . The light-emitting device according to claim 1 , wherein optical axes of the plurality of laser light sources, respectively, are in parallel to the optical axis of the condensing optical system.
7 . The light-emitting device according to claim 1 , wherein the condensing optical system is made of a single condenser lens.