Patent ID: 8038306

Claim:
A light source device comprising: a plurality of light emitting elements that emit laser light; a wavelength conversion element that includes a light pass-through region through which the laser light emitted from one of the light emitting elements passes, which converts light of the wavelength included in the laser light into light of a predetermined wavelength, and which emits the light having been converted into the predetermined wavelength and light having not been converted into the predetermined wavelength, and that is constituted by a plurality of the light pass-through regions so that the wavelengths of the light converted by the light pass-through regions are different from each other; a wavelength selective element that includes a light selective region into which the light having been converted into the predetermined wavelengths and the light having not been converted into the predetermined wavelengths are incident, functioning as a resonator mirror of the light emitting element by selecting the light having not been converted into the predetermined wavelengths and reflecting the light having not been converted into the predetermined wavelengths toward the light emitting element while allowing the remaining laser light to pass therethrough, and a base member having a plurality of the light selective regions so that the wavelengths of the light selected by the light selective regions are different from each other; and a temperature variation section that varies the temperature of each light selective region and that varies the wavelengths of light selected by each light selective region.