Patent ID: 8556432

Claim:
A light source unit comprising: a luminescent plate having a luminescent light emission portion on which is formed a layer of a luminescent material which receives excitation light to emit luminous light and a diffuse transmission portion which transmits light in a diffusing fashion; a first light source which emits light of a wavelength band which can excite the luminescent material; a second light source which emits light of a wavelength band which differs from the luminous light emitted from the luminescent material and the light emitted from the first light source; a light guiding optical system which guides light of respective wavelength bands in color emitted from the luminescent plate to a predetermined plane; and a light source control part for controlling individually the emission of light from the first light source and the second light source, wherein the luminescent plate is disposed on optical paths of the first light source and the second light source, and wherein a light shining position of light from the first light source and a light shining position of light from the second light source are made to differ from each other on the luminescent plate.