Sharp Kabushiki Kaisha Corporation

Yasuo Fukai

Koji Takahashi

Yoshiyuki Takahira

Yosuke Maemura

Katsuhiko Kishimoto

David James Montgomery

Toshiyuki Okumura

Yoshitaka Tomomura

James Rowland Suckling

Kei Yamamoto

A headlampincludes (i) a laser elementfor emitting a laser beam, (ii) a light emitting section, including a sealing material made from an inorganic material, for emitting fluorescence upon receiving the laser beam emitted from the laser element, and (iii) a heat sinkfor releasing, via a contact surface of the heat sinkwhich contact surface is in contact with the light emitting section, heat generated in the light emitting sectionin response to the laser beam emitted onto the light emitting section, the light emitting sectionexisting within a range which is determined on the basis of the contact surface and with which desired heat releasing efficiency is obtained.

Light emitting device, vehicle headlamp, illumination device, and vehicle

An illumination devicewhich is a light emitting device capable of emitting white light, includes: a laser elementfor emitting a blue laser beam; a light emitting sectionfor generating fluorescence by be being irradiated with the blue laser beam emitted from the laser element; and a parabolic mirrorfor reflecting the fluorescence generated from the light emitting section, the parabolic mirrorbeing disposed on an irradiated surface side which irradiated surface is a surface of the light emitting sectionwhich surface is irradiated with the blue laser beam. This allows the illumination deviceto efficiently project the white illumination light.

Light emitting device, illumination device, and vehicle headlamp

A light emitting apparatus includes: a laser element which emits laser light; a light emitting section which generates fluorescence in response to the laser light emitted from the laser element; a parabolic mirror which reflects the fluorescence generated by the light emitting section; and a multilayer filter which transmits the laser light and reflects the fluorescence, the laser element being provided outside the parabolic mirror, the parabolic mirror being provided with a window part through which the laser light passes, and the multilayer filter being provided so as to cover the window part.

Light emitting apparatus, vehicle headlamp, illuminating apparatus, and vehicle, and method for assembling the light emitting apparatus

Provided is a light projection structure (), including: a reflective member () including a reflective surface (), the reflective surface () being formed as a concave surface having a focal point (f) positioned near its apex (t); and a light emitting member () disposed at the focal point (f) and its vicinity, for emitting light when excited by excitation light.

Light projection structure and lighting apparatus

An OBO planar waveguide device includes an Si substrate, an SiOlayer formed on the Si substrate, and a plurality of Si optical waveguides provided on the Si substrate in parallel to each other. A heater and a heat sink are provided on opposing side end portions of the Si substrate respectively. As a result of a function of the heater and the heat sink, gradient of temperature distribution of the Si substrate is formed in a direction in which the plurality of Si optical waveguides are aligned. Thermal resistance of the Si substrate in the direction in which the gradient of temperature distribution is formed is greater than 20 K/W and lower than 2000 K/W. The OBO planar waveguide device attaining reduced power consumption is thus obtained.

Growing community of inventors

Osaka, Japan

Yasuo Fukai