Ushio Denki Kabushiki Kaisha

Newfrey Lcc

Kyoto University

Ken Kataoka

Hiroshige Hata

Masanori Yamaguchi

Yoichi Kawakami

Toshio Maruyama

Mitsuru Funato

Hiroyuki Takada

Kaoru Nakamura

Masasi Nanba

Ryukei Shimizu

Takao Oto

Tsuyoshi Maesoba

Ryan Ganipan Banal

Koichi Okamoto

A light emitting element includes an LED element that emits an excitation light having a single peak wavelength within a range of greater than or equal to 380 nm and less than or equal to 500 nm; a fluorescent body to which at least a portion of the excitation light enters to emit fluorescence; and a light extraction surface that emits an output light formed by superimposing the excitation light and the fluorescence. The output light exhibits light emission over a range of at least greater than or equal to the peak wavelength of the excitation light and less than or equal to 1050 nm, and all of the output light have a light emission intensity of greater than or equal to a light emission intensity at 1050 nm within a range of at least the peak wavelength of the excitation light to 1050 nm.

Light emitting element

The present invention is intended to provide an electron-beam-pumped light source capable of irradiating one surface of a semiconductor light-emitting device uniformly with an electron beam, and capable of obtaining a high light output without increasing an accelerating voltage of the electron beam and, in addition, capable of efficiently cooling the semiconductor light-emitting device. An electron-beam-pumped light source of the present invention includes: an electron beam source and a semiconductor light-emitting device excited by an electron beam emitted from the electron beam source, and characterized in that the electron beam source includes a planar electron beam emitting portion and arranged in the periphery of the semiconductor light-emitting device, and light exits from a surface through which the electron beam from the electron beam source of the semiconductor light-emitting device enters.

Electron-beam-pumped light source

Provided is a compact ultraviolet irradiation apparatus which is capable of emitting ultraviolet radiation with high efficiency. This ultraviolet irradiation apparatus includes, in a vessel, a semiconductor multi-layered film element and an electron beam irradiation source for irradiating the semiconductor multi-layered film element with an electron beam, the vessel being hermetically sealed to have a negative internal pressure and having an ultraviolet transmitting window. Furthermore, the semiconductor multi-layered film element includes an active layer having a single quantum well structure or a multi quantum well structure of InAlGaN (0&#x2266;x&#x3c;1, 0&#x3c;y&#x2266;1, x+y&#x2266;1), and the active layer of the semiconductor multi-layered film element is irradiated with an electron beam from the electron beam irradiation source. This allows the semiconductor multi-layered film element to emit ultraviolet radiation out of the vessel through the ultraviolet transmitting window. Furthermore, Equation (1) below is satisfied,4.18&#xd7;10.6&#xd7;&#x2003;&#x2003;Equation (1)where V (kV) is the acceleration voltage of the electron beam and t (nm) is the thickness of the active layer.

Ultraviolet irradiation apparatus

A connecting fastener in which a first member and a second member are linked so that they can turn relative to one another is provided with (1) a first plate part which is fixed to a fixed member ; (2) a second plate part which is fixed to a second member ; and (3) a hinge set in place between the first plate part and the second plate part and supporting both plate parts so that they can turn relative to one another; the first plate part, second plate part and hinge part forming an integral piece as they are made of a synthetic resin. Then, a spring is set in place on the first plate part and the second plate part , the spring energizing so that both plate parts are in a non-turning state on either side of the hinge

Connecting fastener

Growing community of inventors

Tokyo, Japan

Ken Kataoka