Nichia Corporation

Tomotaka Honda

Hiroto Tamaki

Shinichi Nagahama

Yoshinori Murazaki

Yukihiro Hayashi

Atsutomo Hama

Junji Takeichi

A light emitting device includes an excitation light source that emits excitation light, a wavelength conversion member, a light guide, and a light guide distal end member. The wavelength conversion member absorbs the excitation light emitted from the excitation light source, converts its wavelength, and releases light of a predetermined wavelength band. The light guide in which the center part (core) of its cross section has a refractive index that is higher than the refractive index of the peripheral portion (cladding) guides the excitation light emitted from the excitation light source to the wavelength conversion member. The light guide distal end member supports a distal end of the light guide on the wavelength conversion member side. The light guide distal end member is formed from a material that reflects the excitation light and/or the light that has undergone wavelength conversion.

Light emitting device

A light emitting device, comprises: an excitation light source that emits excitation light; a wavelength conversion member that absorbs the excitation light emitted from the excitation light source, converts its wavelength, and releases light of a predetermined wavelength band; a light guide in which the center part (core) of its cross section has a refractive index that is higher than the refractive index of the peripheral portion (cladding), and which guides the light emitted from the wavelength conversion member to the outside; and wherein the wavelength conversion member is produced by laminating a plurality of layers that wavelength-convert different wavelengths of light.

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Anan, Japan

Tomotaka Honda