Patent ID: 9459520
Filing Date: 2016-10-04
CPC Classification: G02B,G03B,H01S,H04N

Claim Text:
1. A light source unit that emits at least fluorescence, the light source unit comprising: one or more kinds of phosphor; a substrate, on which the one or more kinds of phosphor is applied; a plurality of semiconductor laser elements arrayed at a predetermined interval in a package, wherein each of the semiconductor laser elements emits a laser light beam through a light emission region; and a first optical system that comprises a first lens system, a multiplexing optical member having a light entering surface and a light exiting surface, and a second lens system, wherein the first optical system directs the laser light beams emitted from the respective semiconductor laser elements toward the substrate, wherein the first lens system receives the laser light beams emitted from the respective semiconductor laser elements directly without substantial parallelization of the respective received laser light beams, and condenses the received laser light beams on the light entering surface of the multiplexing optical member, wherein the multiplexing optical member multiplexes the laser light beams condensed by the first lens system, into a multiplexed laser light beam having a spatially-uniform intensity distribution, wherein the second lens system condenses the multiplexed laser light beam that has exited from the light exiting surface of the multiplexing optical member onto the one or more kinds of phosphor, and wherein a minimum diameter of the light entering surface of the multiplexing optical member is larger than the interval of the semiconductor laser elements and smaller than a maximum dimension of a surface shape of the light emission region in the package.