Nichia Corporation

Nippon Electric Glass Co., Ltd.

Nichiya Corporation

Yukihiro Hayashi

Atsutomo Hama

Naoto Morizumi

Takafumi Sugiyama

Shinichi Nagahama

Yoshinori Murazaki

Junji Takeichi

Tadahito Furuyama

Masaaki Kadomi

Hiroto Tamaki

Yoshio Umayahara

Masaru Iwao

Takeshi Okada

Tomotaka Honda

Tomonori Morizumi

Hiroaki Shozui

Takeshi Tsujio

A light emitting device wherein discoloration of a reflective layer in an optical component can be prevented and a stable optical output power can be maintained, and a method of manufacturing an optical component used in the light emitting device. The optical component includes a supporting member defining a through-hole, a reflective layer formed on an inner wall defining the through-hole, a protective layer formed on the reflective layer, and a light transmissive member having a light incident surface, a light emitting surface, and an outer circumference side-surface, and disposed in the through hole. The light transmissive member is fixed in the through-hole with a joining portion where the outer circumference side-surface and the protective layer are joined, and an end portion at the light emitting side of the joining portion is covered with a second protective layer disposed continuously on the protective layer and the light transmissive member.

Light emitting device and method of manufacturing light emitting device and optical component used in the same

The light emitting device according to the present invention comprises a laser diode; a wavelength converting member which is configured to convert a wavelength of a light emitted from the laser diode; and a support member which is configured to support the wavelength converting member so that the light passes through two surfaces of the wavelength converting member. The wavelength converting member comprises a fluorescent material and a binder. At least one light transmissive member is disposed on at least one of these two surfaces of the wavelength converting member. The binder has a melting point higher than a melting point of the light transmissive member. The light transmissive member is fixed to the support member by fusion bonding.

Method for manufacturing semiconductor laser device including wavelength converting member and light transmissive member

Light emitting device

In a semiconductor light-emitting device, light from a laser diode is output to the outside after the luminance of the light being enhanced. It includes a support body provided with lead terminals, one or more laser diodes mounted on the support body, a cylindrical reflector fixed to the support body to surround the laser diode(s) and provided with a light reflection surface formed on an inner surface thereof, and a cap placed to cover an opening distal end face of the reflector and held at an opening distal end part of the reflector, the cap being provided at a central part thereof with a solid fluorescent member including a fluorescent substance that is excited by the light from the laser diode and emits light different in colors from light emitted by the laser diode.

Light-emitting device

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.

An optical component that can be attached to an end portion of an optical guiding member, and a light converting member used in the optical component. The optical component comprises a cap having an engaging portion defining a bore engaged with an end member of a light guiding member, and an arranging portion defining a opening connected to the bore in the engaging portion, and a light converting member disposed in the opening formed in the arranging portion.

Optical component, light converting member, and light emitting device

The light emitting apparatus according to the present invention includes a light source; and an optical component including a fixed member having a through hole, and a wavelength conversion member having at least one part thereof arranged in the through hole, a cut-in part or a hole part being formed in a direction substantially perpendicular to the longitudinal direction of the through hole of the fixed member; where the light from the light source is guided to the wavelength conversion member.

Light emitting apparatus

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.

There is provided a light emitting device using an optical component capable of emitting light having a wavelength different from that of light exit from an optical fiber and obtaining light of high output, and capable of being easily attached to an end of the optical fiber. The optical component includes an optical fiber holding member for holding an optical fiber, a light conversion member, and a cap having an inner hole allowing the light conversion member and the optical fiber holding member to be inserted into and an engagement part with an opening for engaging inserted members at one end of the inner hole. The light conversion member inserted into the inner hole of the cap is fitted into the inner hole with the optical fiber holding member pressed against the engagement part. The opening of the engagement part is smaller than a maximum diameter of the light conversion member.

Optical component and light emitting device using the same

An optical component comprises: an optical fiber having the core and the clad; a light guide holding member attached to the exit end of the optical fiber; a wavelength conversion member that contains a fluorescent substance; and a reflection means provided between the exit end of the optical fiber and the wavelength conversion member, or between the light guide holding member and the wavelength conversion member. An increase in optical output is made possible not by reducing reflection as with conventional optical components, but on the contrary by actually producing reflection. Therefore, optical output can be increased by a means other than forming an optical film that reduces Fresnel reflection.

Optical component, light emitting device, and method for manufacturing optical component

The present invention provides a light emitting device comprising: an excitation light source which radiates excitation light; a wavelength converting member which absorbs and converts the wavelength of at least part of the excitation light radiated from the excitation light source, and releases light with a predetermined wavelength band; a light guide for guiding the excitation light radiated from the excitation light source to the wavelength converting member, with one end at the excitation light source and the other end at the wavelength converting member, wherein the refractive index of the cross-sectional center region (core) is higher than that of the circumferential region (clad); and a thermally conductive transparent film which contacts with the wavelength converting member.

A light emitting device includes a first unit having a first excitation light source including a laser element emitting blue wavelength band excitation light, and a first wavelength converting member including at least one type of fluorescent material and which absorbs at least a portion of a first excitation light, converts the wavelength, and releases light with a wavelength longer than the first excitation light, and a second unit having a second excitation light source including a laser element which emits excitation light with a wavelength band shorter than the blue wavelength band excitation light, and a second wavelength converting member which includes at least one type of fluorescent material and which absorbs at least a portion of a second excitation light, converts the wavelength, and releases light with a wavelength longer than the second excitation light. The first unit and the second unit are combined using a bundle fiber.

Growing community of inventors

Tokushima, Japan

Yukihiro Hayashi