Kokusai Denshin Denwa Kabushiki Kaisha

Kao Corporation

Sony Corporation

Kdd Corporation

Kokusai Denshin Denwa K.k.

Yukio Noda

Shigeyuki Akiba

Masatoshi Suzuki

Hirotoshi Tawara

Yukitoshi Kushiro

Tetsuya Nakai

Yoshinori Mimura

Katsuyuki Utaka

Toshio Tani

Nobuhiro Fujiwara

Yasuo Yukita

Osamu Shinbori

Kazuya Kojima

Yuichi Matsushima

Takaya Yamamoto

Kazuo Sakai

Susumu Fujinami

Masashi Usami

Tomohisa Hirata

Hidesato Kizaki

Hideharu Tokiwa

Satoshi Nagai

Makoto Katou

Takuaki Harada

Naoki Norimatsu

Kimie Sannomiya

Tokuji Noguchi

Yutaka Hamano

Shunichi Ohno

Tomomi Sudo

Mimura Yoshinori

A cleaning toolhaving at least one side openingand a cleaning rollat a cleaning head, wherein a dust guide surfacefor leading dust from a surface to be cleaned to the side openingis provided along a lower end of the side opening; the cleaning rollis formed of an elastic roll having a surface covered with a thin film, and is rotatably arranged in a position to close the side openingand to be in contact with the surface to be cleaned; and the cleaning rollrotating according to movement of the cleaning headtakes the dust through the dust guide surfaceinto the side openingwhile pushing the dust against the surface to be cleaned.

Cleaning tool

A lower face of a base body () includes a wave-like corrugated surface portion () of which cross-section in a direction perpendicular to a predetermined direction along which cleaning is performed with a cleaning device body () in a planar view is wave-shaped as having a ridge portion () and a valley portion () arranged alternately and continuously. The valley portion () of the wave-like corrugated surface portion () includes an oblique valley portion () of which end part is opened to a side portion of the base body () facing to the predetermined direction as being extended obliquely against the predetermined direction to obliquely guide objects such as dust to be stuck to a cleaning sheet () in accordance with wiping of the surface to be cleaned.

Cleaning device

In a cleaning device, a dustpan portionis supported to a frameso as to freely oscillate independently from a scraping up bodyin a vertical direction, and a dust receiving portionC of the dustpan portionis supported so as to be disconnected from the frame

In a cleaning device, the scraping up body and the rotating body rolling the adhesive roll are rotatably supported to the frame, and the adhesive roll is rotatably arranged on the scraping up body and the rotating body in parallel.

Cleaner

Cleaning device and method of use

An optical beam diameter reducer for reducing a beam diameter of an optical beam comprises a three-layer structure composed of a central core, a refractive index inclined layer formed outside the core which refractive index gradually decreases toward the outside in the radial direction and a cladding layer formed outside the refractive index inclined layer.

Optical beam diameter reducer

A 1.3 .mu.m-band optical amplifier includes an optical amplifying fiber doped with Yb ion for emitting light in 1.02 .mu.m band by pumping of the 0.98 .mu.m band light and Pr ion for amplifying signal light by pumping of the 1.02 .mu.m band light. Both ends of the optical amplifying fiber are connected to optical fiber gratings for selectively reflecting 1.02 .mu.m band light via matching connecting members and tapered core optical fibers. The optical fiber gratings form a 1.02 .mu.m-band resonator. A Wavelength Division Multiplexing (WDM) optical coupler multiplexes the signal light and pumping light from an pumping laser and supplies the thus-multiplexed light to the optical fiber grating. The pumping laser comprises a laser device which causes laser oscillation at 0.98 .mu.m. A 1.5 .mu.m-band optical amplifier having a similar configuration is also disclosed.

Optical amplifier

Internal shorting of large capacity multi-layer type nonaqueous electrolyte secondary cells is minimized by inclusion of heat resistant porous film layers adjacent thermally fusible resin microporous films disposed between negative electrodes and positive electrodes in an electrode assembly and between adjacent electrode assemblies stacked together to provide an electrode stack. The heat resistant porous film layers may be organic or inorganic temperature resistant sheet materials exhibiting heat resistance to temperatures of at least about 600.degree. C.

Multi-layer type nonaqueous electrolyte secondary cell

A high power laser transmitting fluoride glass fiber of an enhanced 2.94- .mu.m laser damage threshold value is disclosed, in which either of the core with a high refractive index and the cladding with a low refractive index is formed of fluoride glass which contains fluorine (F) as a component but has it substituted with 0 to 4.1 mol % of bromine (Br), chlorine (Cl), or bromine and chlorine. The optical fiber of the present invention may have its core formed of fluoride glass and its cladding formed of fluorine-contained resin, and the core glass has a composition that 70 to 80% of fluorine (F) is substituted with 0 to 4.1 mol % of bromine (Br), or chlorine (Cl), or bromine and chlorine.

Fluoride optical fiber for high power laser transmission

A lithium ion secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator, and a heat-resistant and heat-insulating film having pores. The heat-resistant and heat-insulating film is formed on at least one of surfaces opposed to each other of the positive and negative electrodes. The positive electrode and the negative electrodes are laminated through the separator. The heat-resistant and heat-insulating film contains metal oxide, metal carbonate or metal nitride. The heat-resistant and heat-insulating film is formed by spraying powders of metal oxide, metal carbonate or metal nitride. The spraying is plasma spraying. A surface where the positive electrode and the negative electrode are not opposed to each other is provided. On at least one of surfaces forming the interface, the heat-resistant and heat-insulating film is formed by spraying powders of metal oxide, metal nitride or the like.

Lithium ion secondary battery

A high-output, single fundamental transverse mode solid state laser is disclosed which uses a semiconductor laser array as an excitation light source. The solid state laser comprises: a laser element which includes a core containing an element added as a laser medium, a cladding containing no such laser medium element, and reflecting mirrors coated over the cladding surface for repeatedly reflecting incident excitation light so that it may repeatedly pass through the core; an excitation light source formed by semi-conductor laser or light emitting diode array; means for guiding the excitation light from the excitation light source to one side of the laser element for incidence thereto; and a resonator for the oscillation of the solid state laser.

Solid state laser

A method and an apparatus for manufacturing a fluoride glass fiber preform are disclosed which preclude the step of pouring a glass melt into a mold from a crucible, and hence permit the fabrication of a long, homogeneous fluoride glass fiber preform free from foreign substances and air bubbles leading to scattering and which also allow ease in the fabrication of a preform having an elliptic core portion for drawing a polarized wave retaining fiber.

Method and apparatus for manufacturing preform for fluoride glass fiber

A semiconductor external modulator is disclosed in which the mode of polarization of incident light, the crystal plane of the substrate (the direction of application of an electrical field), the energy gap of the optical waveguide layer, and the direction of travel of light are determined so that, of variations in the real and imaginary parts of the refractive index of the optical waveguide layer which are caused by the application of the electric field to the semiconductor external optical modulator, the variation in the real part of the refractive index may be reduced to substantially zero.

Semiconductor external optical modulator

A method for manufacturing a semiconductor optical integrated device in which a semiconductor element A having an optical waveguide region and a semiconductor element B having another optical waveguide region are integrated on a single substrate. In accordance with the present invention, there is provided steps of growing the optical waveguide region of the semiconductor element A and a protective layer therefor are grown on the entire area of the substrate surface, selectively removing them from the substrate surface in the region to be ultimately occupied by the semiconductor element B, and forming in the region the optical waveguide region of the semiconductor element B through crystal growth.

Growing community of inventors

Tokyo, Japan

Yukio Noda