| 摘要 |
PROBLEM TO BE SOLVED: To remarkably reduce color irregularities and luminance unevenness, in a light source device combining semiconductor light-emitting elements (solid light sources) and wavelength conversion elements (a wavelength conversion member).SOLUTION: A light source device includes: a ring-shaped wavelength conversion member 12 of the same thickness D as a disc-shape transparent member 11, arranged so as to surround an outer periphery of the disc-shape transparent member 11, and with a width H in a radial direction uniform along a circumferential direction of the disc-shape transparent member 11; and a solid light source 15 positioned spatially away from the disc-shape transparent member 11, emitting light of a given wavelength out of a wavelength region from ultraviolet to visible light as excitation light and letting the excitation light incident into a center part of the disc-shape transparent member 11. |
