Hitachi, Ltd.

Hitachi Cable, Inc.

Other

Hitachi Powdered Metals Co., Ltd.

Yamanashi University

Yuzo Ito

Akio Takahashi

Yuichi Satsu

Tomiya Abe

Yoshitaka Takezawa

Tatsuya Sugita

Hiroaki Miyata

Koki Hirano

Masao Suzuki

Noboru Baba

Chio Ishihara

Atsushi Kakuta

Masato Isogai

Hideaki Katayama

Kazuo Asaka

Hiromu Terao

Kazuhiro Satou

Chikara Tanaka

Harukazu Nakai

Shuichi Oohara

Sukekazu Aratani

Takashi Aoyama

Hiromitsu Kuroda

Hiroki Yasuda

Kouki Hirano

Tomoyuki Hamada

Seigi Aoyama

Takahiro Nakayama

Hiroshi Okikawa

Junichi Katagiri

Yasuo Imanishi

Toshiyuki Horikoshi

Hiroshi Komuro

Shigekatsu Sato

Hidenori Okuzaki

Masaki Akatsuka

Kayo Ohno

Atushi Kakuta

Kayo Ono

Shintaro Hattori

The vinyl-type conducting polymer precursor is dissolved in solution containing volatile solvent such as methanol, and the precursor fibers are produced by electrospinning. The vinyl-type conducting polymer fibers are produced by heat treatment of the precursor fibers at certain temperature and time in a vacuum or in an inert gas atmosphere, or by zone reaction method, followed by doping with dopant.

Method for producing conducting polymer fibers with vinyl and conducting polymer fibers with vinyl produced thereby

An electromagnetic shielding filter has two transparent boards and a conductive mesh with plural wires, where the conductive mesh is sandwiched between the two transparent boards. The plural wires are formed of a Cu&#x2014;Sn&#x2014;In alloy or a Cu&#x2014;Ag alloy.

Electromagnetic shielding filter

A polymer optical waveguide has a substrate, a buffer layer formed on the substrate, and a polymer waveguide main body formed on the buffer layer. The buffer layer is made of a polymer material that can absorb a difference in thermal expansion coefficient between the substrate and the polymer optical waveguide.

Polymer optical waveguide and method of making the same

A solvent-free thermosetting resin composition which comprises an epoxy resin (a) and a product (b) of the reaction of an organosilicon compound, represented by the general formula (1) (where R is an organic group containing a functional group reactive with an epoxy resin by addition reaction; and R1 is a methyl or ethyl group), with water, the product (b) containing organosilicon compound polycondensates formed in the epoxy resin (a) and having a degree of polycondensation of 2 or higher, and which has a low viscosity at a room temperature (25&#xb0; C.) and gives a cured resin having intact material properties, especially intact high-temperature mechanical properties; a process for producing the resin composition; and a product obtained by applying the composition.

Solvent-free thermosetting resin composition, process for producing the same, and product therefrom

A solvent-free thermosetting resin composition which comprises an epoxy resin (a) and a product (b) of the reaction of an organosilicon compound, represented by the general formula (1) (where R is an organic group containing a functional group reactive with an epoxy resin by addition reaction; and R1 is a methyl or ethyl group), with water, the product (b) containing organosilicon compound polycondensates formed in the epoxy resin (a) and having a degree of polycondensation of 2 or higher, and which has a low viscosity at a room temperature (25&deg; C.) and gives a cured resin having intact material properties, especially intact high-temperature mechanical properties; a process for producing the resin composition; and a product obtained by applying the composition.

Optical signals of which wavelength is multipled and which are transferred via an optical fiber make incidence to refractive index distributing lens and are converted into substantially parallel light beams, the optical signals converted make incidence into a polarized light conversion element and are separated therein into two light beams and are emitted in a form of two linear polarized light beams of which polarization direction are aligned. The linear polarized light beams are separated by wavelength separation filters and , and make incidence with every two wavelength components either into a polarized light conversion element or into polarized light conversion element and the optical paths for the light beams separated into two by the polarized light conversion element are joined to form one light beam path for every waveform component. The optical signals of the four wavelength components are reflected either by a mirror or by a mirror are converged by such as a hologram lens and, after being reflected by a mirror are detected for every wavelength component by the photo detector array

Wavelength separation optical device and multiple wavelength light transmission module

Linear polarized light beams are separated by wavelength separation filters , and , and make incidence with every two wavelength components either into a polarized light conversion element or into polarized light conversion element , and the optical paths for the light beams separated into two by the polarized light conversion element are joined to form one light beam path for every waveform component. The optical signals of the four wavelength components are reflected either by a mirror or by a mirror , are converged by such as a hologram lens , and, after being reflected by a mirror , are detected for every wavelength component by the photo detector array

A measurement method and apparatus, which are capable of simply measuring the water content of an object with a high degree of accuracy, is characterized by irradiating the surface of the object with at least two monochromatic light beams having different wave length values, one of the wave length values being less than 1350 nm; measuring the intensity of light for each of the light beams reflected from the surface of the object using a light intensity-measurement unit; obtaining the reflective absorbance (A ) of each light beam; calculating a reflective-absorbance differences (&Dgr;A ) between, or a reflective-absorbance ratio (A &prime;) of, the respective light beams, respectively; and estimating the water content of the measured object by using the relationship between water content and the reflective-absorbance differences or reflective-absorbance ratio, which relationship stored in a memory device in advance.

Water content-measurement method and water content-measurement apparatus, and electrical component-fabrication method using the measurement apparatus and method

The present invention provides a soft magnetic powder composite core for an electric apparatus produced with soft magnetic particles having electric insulating layers on the surfaces thereof, wherein said electric insulating layers are formed by mixing said soft magnetic particles with an insulating layer-forming solution which comprises a phosphating solution and a rust inhibitor, which is an organic compound containing at least one of nitrogen or sulfur having a lone pair of electrons suppressing the formation of iron oxide and surfactant, and drying the treated soft magnetic particles at a predetermined temperature. The soft magnetic powder composite core is excellent in iron loss and magnetic flux density.

Treatment solution for forming insulating layers on magnetic particles process for forming the insulating layers, and electric device with a soft magnetic powder composite core

An insulating material of high electrically insulating properties and high thermal conductivity is provided wherein the high thermal conductivity is attained by having a liquid crystal resin comprising a polymerization product of a resin composition containing a monomer which has a mesogen group.

Insulating composition

Process for forming insulating layers on soft magnetic powder composite

An electro-luminescent conversion light emitting device for use in an information communication field. The light emitting device includes a semi-transparent reflective film substrate. On the semi-transparent reflective film is formed a transparent conductive film. On the transparent conductive film is formed a light emitting layer of organic thin film on the transparent conductive film. On the light emitting layer is formed an electrode. The semi-transparent reflective film 2 transmits parts of the light emitted by the light emitting layer to the glass substrate and reflects parts of the light to the light emitting layer. The semi-transparent reflective film acts as a light resonator with the Ag-Mg metal electrode on back of the light emitting layer.

Organic light emitting device and substrate plate for it

In order to diagnose non-distructively the deterioration degree of such as insulation oil and insulation paper during operation of an oil filled electrical machine and apparatus without stopping the operation thereof, a deterioration degree disgnosis method for the oil filled electrical machine and apparatus makes use of optical fibers (6, 7) and oil immersed probe (5) and diagnoses the deterioration degree of an insulation paper non-distructively based on reflection absorbance difference between those for any two wavelengths of the insulation paper.

Deterioration diagnosis method and device of electrical machine and

According to the present invention, there is provided a non-linear optical device comprising a non-linear optical medium comprising an organic compound, which remarkably improves the non-linear optical properties. The non-linear optical device according to the present invention is suited for the second and third harmonic generations, photomixing optical parametric oscillations, optical switches and optical bistable devices.

Non-linear optical device

In a semiconductor laser wavelength conversion device comprising a semiconductor laser beam souce, a lens, a single crystal of a non-linear optical material and a filter, the non-linear optical material is represented by the general formula, A--(Cx)--B, where (Cx) is --(CH)--or --CH.dbd.CH--C(.dbd.CH)--, A and B are each atomic group comprising a .pi.-electron conjugated structure containing at least one electron withdrawing group or one electron donating group. The device can generate a second harmonic wave having an intensity of 4 or more stronger than that of urea and having a cutoff wavelength of 420 nm or less.

Organic non-linear optical device

Growing community of inventors

Mito, Japan

Yuzo Ito