Hitachi, Ltd.

Nec Corporation

Other

Sanyo Electric Co., Ltd.

Agc Inc.

Hitachi Metals, Ltd.

Hitachi Koki Co., Ltd.

Hitachi Maxell, Limited

Sumitomo Metal Industries, Inc.

Hitachi Cable, Inc.

Keio University

Agc Glass Europe

Agc Flat Glass North America, Inc.

Agc Vidros Do Brasil Ltda.

Ricoh Company, Ltd.

Shigeru Nakamura

Takeshi Maeda

Kazuo Shigematsu

Yoshito Tsunoda

Takeshi Shimano

Akira Arimoto

Toshimitsu Kaku

Takeshi Nakao

Kouji Arikawa

Masayuki Inoue

Tsuyoshi Toda

Masahiro Ojima

Kunikazu Ohnishi

Yukio Fukui

Kazuhito Tajima

Emmanuel Le Taillandier De Gabory

Masuo Kasai

Masahiro Sakauchi

Koichi Maruyama

Kimio Tatsuno

Masahiko Takahashi

Shigeyuki Yanagimachi

Mariko Umeda

Koichiro Wakabayashi

Masateru Watanabe

Toshiaki Tanaka

Hisataka Sugiyama

Hirofumi Sukeda

Seiichi Mita

Makoto Miyamoto

Tetsuya Nishida

Shinji Fujita

Yoshinori Miyamura

Shigeki Takahashi

Jun Ushida

Toshimasa Kamisada

Kenkichi Suzuki

Yasuyuki Sugi

Kiyoshi Matsumoto

Keiichi Matsumoto

Tokuya Kaneda

Katsuhiko Shibata

Harukazu Miyamoto

Motoyasu Terao

Tohru Sasaki

Atsushi Saito

Junichi Abe

Takeshi Kato

Norio Ohta

Fumiyoshi Kirino

Atsufumi Shibayama

Tetsuo Andou

Masaru Ito

Tomohiko Omura

Morishi Izumita

Junji Tanaka

Kenji Nakamura

Kiyoshi Fukuchi

Tomoyuki Hino

Yoshizumi Eto

Hiroshi Shimoda

Tohru Hotta

Akira Tsukihashi

Masatoshi Tokushima

Hiroyuki Tsuchinaga

Masashige Ishizaka

Tomoaki Kato

Wasao Takasugi

Takashi Toyooka

Hirohisa Sano

Toshinori Sugiyama

Kenichi Mizuishi

Tsuneo Suganuma

Toshio Niihara

Kaori Kawano

Kazuo Tsubota

Kenji Mizutani

Yutaka Urino

Itaru Nishioka

Nobuo Takeda

Masayoshi Esashi

Atsushi Ichikawa

Akira Saito

Akito Sakemoto

Yuhei Gima

Yoshihiro Hamakawa

Yoshiyasu Ueno

Yoshimasa Ono

Hiroshi Yasuoka

Eiichi Seya

Hiromichi Murai

Sadao Takahashi

Masahide Tokuda

Hirobumi Ouchi

Tetsuya Hiramatsu

Tsuyoshi Miyai

Katuaki Chiba

Koji Muraoka

Nobuo Imada

Michiyoshi Sawada

A measurement method according to an example embodiment executed by a computer includes: selecting one of a plurality of sample wavelengths as a wavelength of output light of a semiconductor wavelength-tunable laser, and controlling output of the output light in such a way that the selected one sample wavelength discretely and sequentially changes with time; acquiring, for each of the plurality of sample wavelengths, an electrical signal obtained by detecting and converting interference light obtained by combining and interfering scattered light obtained by irradiating a sample with measurement light, and reference light for the measurement light and the reference light obtained by splitting the output light; and deriving a scattering profile of the sample by performing compressed sensing on the electrical signal obtained for each of the plurality of sample wavelengths.

Measurement method, measurement device, and nontransitory computer-readable medium

The optical interference tomographic imaging device is provided with: a wavelength sweeping laser light source; a branching unit that branches light emitted from the wavelength sweeping laser light source to object light and reference light; an irradiation unit that scans a predetermined range by irradiating different positions on the surface of the measurement target object with the object light outputted from the branching unit; a measurement unit that, after irradiation on the measurement target object, generates information about a change in the interference light intensity ratio between the reference light and the object light scattered from the measurement target object; and a control unit that, on the basis of the information about the change in the interference light intensity ratio generated by the measurement unit, acquires structure data in the depth direction of the measurement target object.

Optical coherence tomography (OCT) apparatus and method for controlling an optical coherence tomography apparatus

An optical coherence tomographic imager for contributing reduction of the number of man-hours for evaluation to obtain a wavelength sweeping operation of continuous, linear, and monotonic change while utilizing a wavelength-tunable laser having a structure that is less susceptible to mechanical disturbance. The optical coherence tomographic imager includes a wavelength-tunable light source, a branching means, an irradiation means, a photoelectric conversion measuring means, and a processor. The wavelength-tunable light source outputs light whose wavelength is determined by a plurality of light source drive parameters. The branching means branches output light of the wavelength-tunable light source into object light and reference light. The irradiation means irradiates an object to be measured with the object light. The photoelectric conversion measuring means obtains interference light intensity measurement values by causing object light scattered from the object to be measured and the reference light to interfere with each other and to be guided to a light receiver. The processor reorders the interference light intensity measurement values based on the output light wavelengths.

Optical coherence tomographic imager, optical coherence tomographic imaging method, and program

A swept-source optical coherence tomography (SS-OCT) apparatus includes a plurality of wavelength-tunable light sources. The SS-OCT apparatus includes a first optical coupler configured to receive an output from each of the plurality of wavelength-tunable light sources. The optical coupler is configured to split the received output from the plurality of wavelength-tunable light sources into a reference optical path and a sample optical path. The sample optical path is configured to illuminate a sample. The SS-OCT apparatus includes a second optical coupler configured to receive return optical signals from the reference optical path and the sample optical path, and to output an optical interference signal. The SS-OCT apparatus includes a detector configured to detect the optical interference signal; and a controller configured to receive an electrical signal based on the detected optical interference signal. The controller is configured to generate a depth profile of the sample using compressed sensing.

Optical tomography system and method of using

An optical coherence tomography apparatus includes a branching and merging device that branches a light beam emitted from a wavelength sweeping laser light source into an object light beam and a reference light beam, a balanced photodetector that generates information about a change in an intensity ratio of interference light beams, which are generated by the interference between the object light beam and the reference light beam, wherein the object light beam is scattered from the measurement object after being transmitted through the transparent substrate including a structure that changes a thickness, and a control unit that acquires structural data of the measurement object in a depth direction based on the information about the change in the intensity ratio of the interference light beams and connects the structural data while moving an irradiation position of the object light beam with a position of the above structure as a reference.

Optical coherence tomography apparatus, imaging method, and non-transitory computer readable medium storing imaging program

An optical beam controller includes: an optical multiple-beam generator generating a plurality of wavelength-swept optical beams; and an optical frequency difference setter setting an optical frequency difference in any combination of the plurality of optical beams in such a way as to be larger than a band of a photodetector that receives an optical beam.

Optical beam controller and optical interference tomographic imaging device using same

A laminated glass includes a pair of glass plates facing each other, a pair of intermediate adhesive layers positioned between the pair of glass plates and in contact with the respective glass plates, a wiring positioned between the pair of intermediate adhesive layers, and one set of bus bars connected to the wiring. The wiring includes conductive thin wires arranged in parallel with each other between the bus bars. The bus bars are arranged alongside a same edge of the glass plates. In an area corresponding to at least a part of a principal face of the glass plates, the conductive thin wires are arranged as one aggregation and include at least one turnaround. A resistance value of each of the conductive thin wires is within a range of 10% or less with respect to an average value of resistance values of the conductive thin wires.

Laminated glass

A technique for accurately extracting a fingerprint image for accurate authentication from 3D tomographic luminance data of a finger at a high speed. A processing apparatus () according to the present disclosure includes means for, after performing edge detection processing on a tomographic image () at each depth, calculating the total number of edge pixels in the tomographic image from 3D (three-dimensional) tomographic luminance data, and acquiring depth dependence of the number of edges (), and means for extracting a tomographic image having a striped pattern from the depth dependence of the number of edges and the 3D tomographic luminance data.

Processing apparatus, fingerprint image extraction processing apparatus, system, processing method, and computer readable medium

A multicore optical fiber amplifier according to an exemplary aspect of the present invention includes a multicore optical fiber amplification medium including, in a clad, a plurality of cores doped with a rare earth element; signal light introduction means for introducing, into each of the plurality of cores, signal light with a wavelength included in a gain band of the multicore optical fiber amplification medium; excitation light introduction means for introducing, into the clad, excitation light for exciting the multicore optical fiber amplification medium; and control light introduction means for introducing control light into each of the plurality of cores, wherein the control light introduction means introduces the control light into a non-signal core into which the signal light is not being introduced, among the plurality of cores, only when the excitation light is being introduced.

Multicore optical fiber amplifier and optical amplification method using multicore optical fiber amplification medium

It is necessary to reduce the power consumption of a plurality of optical amplifiers when there is a difference in the required pumping power between the plurality of optical amplifiers; therefore, an optical amplifying apparatus according to an exemplary aspect of the invention includes a plurality of optical amplifying means for amplifying a plurality of optical signals, each of the plurality of optical amplifying means including a gain medium; a plurality of laser light generating means for generating a plurality of laser beams; at least one optical coupling means for coupling the plurality of laser beams variably in accordance with a coupling factor and outputting a plurality of excitation light beams, each of the plurality of excitation light beams exciting the gain medium; and controlling means for controlling the coupling factor and an output power of each of the plurality of laser light generating means.

Optical amplifying apparatus and method of amplifying optical signal

To solve the problem that the power consumption of optical amplifiers is not optimized over the life time of an amplifier, the optical amplifier includes a gain medium for amplifying a plurality of optical channels, the gain medium including a plurality of cores through which the plurality of optical channels to propagate respectively and a cladding area surrounding the plurality of cores, a monitor that monitors the temperature of the optical amplifier and producing a monitoring result, a first light source that emits a first light beam to excite the cladding area, a second light source that emits a plurality of second light beams to excite each of the plurality of cores individually, and a controller that controls the first light source and the second light source based on the produced monitoring result.

Optical amplifier and control method therefor

In order to solve the problem that the power consumption of optical amplifiers is not optimized over the life time of a network whose capacity in use varies, an optical amplifier according to an exemplary aspect of the invention includes a gain medium for amplifying a plurality of optical channels, the gain medium including a plurality of cores through which the plurality of optical channels to propagate respectively and a cladding area surrounding the plurality of cores; monitoring means for monitoring the plurality of optical channels inputted into the gain medium and producing a monitoring result; a first light source configured to emit a first light beam to excite the cladding area; a second light source configured to emit a plurality of second light beams to excite each of the plurality of cores individually; and controlling means for making a decision as to whether each of the plurality of cores to transmit one of the plurality of optical channels based on the monitoring result, and controlling the first light source and the second light source based on the decision.

Optical amplifier, optical network including the same, and method for amplifying optical signal

A dimming laminate () includes: a dimming substrate () in which a dimming function material () is provided between two first transparent substrates () and (); and a second transparent substrate () that is bonded to one first transparent substrate () through an adhesive layer (). Each of the first transparent substrates () and () has a different average thermal expansion coefficient at 50-350&#xb0; C. from that of the second transparent substrate (). In the dimming laminate (), a third transparent substrate () is bonded to the other first transparent substrate () through an adhesive layer (), and an average thermal expansion coefficient at 50-350&#xb0; C. is equal between the third transparent substrate () and the second transparent substrate ().

Dimming laminate and multiple glass

This invention provides a prophylactic and therapeutic agent for dry eye, having new ingredients to reduce the deterioration of the lacrimal secretory ability and to inhibit the generation of radical oxygen in lacrimal gland tissue. The prophylactic and therapeutic agent for dry eye of this invention contains the maqui berry extract as the active substance of this invention, i.e. containing delphinidin glycoside extracted from the maqui berry and at least one or more of the active substances delphinidin-3-sambubioside-5-glucoside, delphinidin-3,5-diglucoside, delphinidin-3-sambubioside and delphinidin-3-glucoside, preferably delphinidin-3,5-diglucoside.

Method of improving lacrimal secretion for dry eye treatment using maqui berry extract

In an optical circuit using a Mach-Zehnder-type element, it is difficult to obtain an optical circuit which has a less wavelength dependence and is suitable for achieving high integration. Accordingly, an optical circuit according to the present invention includes: a first Mach-Zehnder-type element including a first branch waveguide, a first branching/combining unit connected to one end of the first branch waveguide, and a second branching/combining unit connected to another end of the first branch waveguide and having a branch configuration different from that of the first branching/combining unit; and a second Mach-Zehnder-type element including a second branch waveguide, a third branching/combining unit connected to one end of the second branch waveguide, and a fourth branching/combining unit connected to another end of the second branch waveguide and having a branch configuration different from that of the third branching/combining unit. The first branch waveguide and the second branch waveguide each include a phase difference adjustment means. In the second branching/combining unit and the third branching/combining unit, light coupling between two basic modes with a phase inverted and a higher-order mode, is smaller than that in the first branching/combining unit and the fourth branching/combining unit. The first Mach-Zehnder-type element and the second Mach-Zehnder-type element are connected with each other through the second branching/combining unit and the third branching/combining unit.

Optical circuit, and optical switch using same

Growing community of inventors

Tokyo, Japan

Shigeru Nakamura