Patent ID: 7923740

Claim:
A light emitting apparatus comprising: a semiconductor light emitting element; and a transparent ceramic phosphor for converting a wavelength of a light emitted from the semiconductor light emitting element, wherein said ceramic phosphor has a relative density of 99.50 to 99.98% and has at least a part of the surface of which average surface roughness is 0.5 to 150 μm in terms of arithmetical average surface roughness Ra, the semiconductor light emitting element emits an ultraviolet light, and the ceramic phosphor corresponding to the semiconductor light emitting element has: a minimum transmission of 0.1 to 40% under a wavelength of 350-420 nm; and a transmission of 10 to 90% under an emission peak wavelength of the ceramic phosphor; and wherein the ceramic phosphor is composed of at least one compound selected from the group consisting of silicate, aluminate, phosphate, halo-phosphate, borate, oxide, tungstate, salt of vanadic acid, oxysulfide, sulfide, nitride and oxynitride.