LIGHT EMITTING DEVICE, LIGHTING DEVICE AND VEHICULAR HEADLAMP

摘要

PROBLEM TO BE SOLVED: To prevent degradation of conversion efficiency of a phosphor due to heat from excitation light.SOLUTION: A headlamp 1 is provided with a light emitting part 4 which receives excitation light emitted from a laser element 2 and emits fluorescent light, and an energy intensity distribution of the excitation light irradiated on the light emitting part 4 is a top hat distribution.