Patent ID: 8894213

Claim:
A light source device utilizing excitation light to emit fluorescence, the light source device comprising: an excitation light source for emitting the excitation light; a fluorescent plate in which a substrate has a surface to which a fluorescent material is applied; a first optical system configured to optically guide, to a light combining section, fluorescence emitted in a first direction by the excitation light being applied to the fluorescent material; and a second optical system configured to optically guide, to the light combining section, fluorescence emitted in a second direction by the excitation light being applied to the fluorescent material; wherein the excitation light source includes a first light source and a second light source; the first direction in which the fluorescence is emitted by the first optical system is a direction in which light is reflected as the fluorescence by the excitation light emitted from the first light source being incident, and the second direction in which the fluorescence is emitted by the second optical system is a direction in which light is reflected as the fluorescence by the excitation light emitted from the second light source being incident.