Fujitsu Corporation

Kyocera Corporation

Nippon Steel Corporation

Konica Minolta, Inc.

Nippon Steel Sumitomo Metal Corporation

Nkk Corporation

Denso Corporation

Hitachi, Ltd.

Aoyama Seisakusho Co., Ltd.

Hitachi Plasma Patent Licensing Co., Ltd.

Naoki Matsui

Yutaka Neishi

Tomoya Sugita

Hiromichi Yoshikawa

Masaya Tajima

Shigetoshi Tomio

Yasuaki Tomoda

Hitoshi Matsumoto

Yoshikazu Kanazawa

Fumitaka Asami

Katsuhiro Ishida

Kyoji Kariya

Taizo Makino

Masashi Higashida

Tetsushi Chida

Keisuke Chiba

Shinpei Yao

Akira Yamamoto

Kenji Awamoto

Toshio Ueda

Hirohito Kuriyama

Yoshihiro Tanimura

Shogo Asaoka

Keishin Nagaoka

Makoto Kosaka

Takashi Fujisaki

Kouji Morita

Yoshimasa Awata

Masayuki Yamazaki

Kiyoshi Takata

Naoyuki Sashima

Toshimasa Itou

Akihisa Obata

Shoji Hori

Junichi Okayasu

Shinsuke Tanaka

Hiroaki Sato

Makoto Okonogi

Tadatsugu Hirose

Hideo Kanisawa

Eri Uchida

Hiroshi Sawada

Hiroyuki Minagawa

Toshiyuki Manabe

Toru Inazumi

Yasuhiro Araki

Koji Soda

Masafumi Suzuki

Sho Karakama

Nobuyoshi Kondo

Hitoshi Oishi

Shuji Kaneto

Hideki Isohata

Yoshimasa Funakawa

Shuan Yang

Kenichi Mitsuzuka

Isao Kawakami

Masaki Fujiwara

Masanobu Tomiyasu

Arata Iso

Hideki Narahashi

Keita Yasuda

Kazuoki Shibuya

Hiroshi Ooba

Jun Taniai

Shigeru Moriyama

Takami Kubo

Shuichi Iwato

Osami Yoshioka

Kouji Omori

Naoto Kitagawa

Takaya Seike

Kazutaka Aoyama

Ryoko Inagaki

Toshihiko Teshima

Naoyuki Sano

An isolator comprises a substrate having a substrate surface; and first and second waveguides that are positioned at least partially side by side along the substrate surface. The first waveguide includes a first core, the second waveguide includes a second core, and the first and second cores are surrounded by a dielectric. The first waveguide includes first and second ends, and includes a port through which an electromagnetic wave is input and output at each of the first and second ends. The second waveguide includes a first portion extending along the first waveguide and a second portion that is not included in the first portion. The second waveguide includes a nonreciprocal member that is in contact with at least a part of the second core of the first portion, and the nonreciprocal member is in contact with at least a part of the second core of the second portion.

Isolator, method of manufacturing isolator, electromagnetic wave transmitter, and light transmitter

An isolator includes a first waveguide with a linear shape and a second waveguide with an annular shape on a substrate including a substrate surface, the first waveguide being positioned along the substrate surface. The first waveguide and the second waveguide each include a core and a cladding. The first waveguide includes a first end, a second end, and a port at each of the first end and the second end for input and output of electromagnetic waves. The core of the second waveguide includes a non-reciprocal member in at least a portion of a cross-section intersecting a direction in which the second waveguide extends.

Isolator, light source apparatus, optical transceiver, optical switch, optical amplifier, and data center

An optical isolatoraccording to the present disclosure includes a substrateand an optical waveguideprovided on the substrate. The optical waveguideincludes a first end part, a plurality of second end partsarranged in an array, and at least one branching partlocated between the first end partand the plurality of second end parts. The optical waveguidehas a portion having non-reciprocity and gives different non-reciprocal phase shift amounts between the first end partand at least two of the second end parts

Optical isolator and light source device

An isolator includes a first core, a second core, a nonreciprocal member, and a magnetic body. The first core and the second core extend in a first direction and are positioned side by side with a cladding therebetween in a second direction that intersects the first direction. The nonreciprocal member is in contact with at least a part of the second core while being positioned side by side with the second core in the second direction. In a magnetic field generated by the magnetic body in a portion where the nonreciprocal member is positioned, a component in a third direction perpendicular to the first direction and the second direction is greater than any component other than the component in the third direction.

The optical switchcomprises a first waveguide, a second waveguide, and an exchanger. The first waveguidecomprises a first end Eand a second end E. The second waveguidecomprises a third end Eand a fourth end E, respectively located on the first end Eside and the second end Eside as viewed from the center of the first waveguide. The exchangercomprises: a first waveguide sectionconfiguring a directional coupler together with the first waveguideand including a phase changing material; and a second waveguide sectionconfiguring a directional coupler together with the second waveguideand including a phase change material. The exchangerinputs electromagnetic waves, input from the first end Eand output from the first waveguide section, to the third end Eside of the second waveguide section. The exchangerinputs electromagnetic waves, input from the third end Eand output from the second waveguide section, to the second end Eside of the first waveguide section

Optical switch

A rolled wire rod wherein the contents of Ti, N, and S (mass %) are respectively [Ti], [N], and [S], and, if [S]&#x2264;0.0010, [Ti] is (4.5&#xd7;[S]+3.4&#xd7;[N]) or more and (0.008+3.4&#xd7;[N]) or less, while if [S]&#x2265;0.0010, [Ti] is (4.5&#xd7;[S]+3.4&#xd7;[N]) or more and (8.0&#xd7;[S]+3.4&#xd7;[N]) or less, the internal structure is a mixed structure of ferrite and pearlite with an area ratio of a ferrite fraction of 40% or more, and a mean area of sulfides present in a range from a surface of the wire rod to a depth position D/8 from the surface of the wire rod is 6 &#x3bc;mor less, wherein D represents a diameter, in mm, in a cross-section of the wire rod at a plane including the axis of the wire rod, and a mean aspect ratio of the sulfides is 5 or less.

Rolled wire rod

An isolator includes a first waveguide and a second waveguide on a substrate having a substrate surface, the first waveguide and the second waveguide located along the substrate surface and overlapping each other as viewed from the substrate. The first waveguide and the second waveguide each include a core and a clad. The core has a first surface facing the substrate surface, and a second surface opposite to the first surface. The clad contacts the first surface and the second surface of the core. The first waveguide has a first end and a second end, and has a port for input and output of electromagnetic waves at each of the first end and the second end. The core of the second waveguide includes a non-reciprocal member in at least one part of a cross section intersecting a direction in which the second waveguide extends.

Isolator, light source device, optical transmitter, and optical amplifier

A display apparatus includes an image projector and a controller. The image projector emits image projection light that projects an image onto a projection-target surface. The controller controls, in a time division manner, the emission direction of the image projection light emitted by the image projector. The controller performs control to prevent the sum of the area of one or more regions of the projection-target surface, on which the image projection light is projected, from exceeding a predetermined upper limit.

Display apparatus, display system, moveable body, and display method

In a rolled steel bar or rolled wire rod for a cold-forged component having a predetermined chemical composition, Y1 represented by Y1=[Mn]&#xd7;[Cr] and Y2 represented by Y2=0.134&#xd7;(D/25.4&#x2212;(0.50&#xd7;&#x221a;[C]))/(0.50&#xd7;&#x221a;[C]) satisfy Y1&#x3e;Y2, the tensile strength is 750 MPa or less, an internal structure is a ferrite-pearlite structure, and the ferrite fraction in the internal structure is 40% or greater. AMOUNT IS 0.30%

Rolled steel bar or rolled wire rod for cold-forged component

In a rolled steel bar or rolled wire rod for a cold-forged component having a predetermined chemical composition, Y1 represented by Y1=[Mn]&#xd7;[Cr] and Y2 represented by Y2=0.134&#xd7;(D/25.4&#x2212;(0.50&#xd7;&#x221a;[C])/(0.50&#xd7;&#x221a;[C]) satisfy Y1&#x3e;Y2, the tensile strength is 750 MPa or less, an internal structure is a ferrite-pearlite structure, and the ferrite fraction in the internal structure is 40% or greater.

A sheet conveyance apparatus that conveys a sheet along a curved path shorter than the sheet and corrects skew of the sheet, includes: a conveyance roller that sends the sheet into the curved path; a guide that guides the sheet along the curved path; and a gate that is hinders advance of the leading end, generates a moment about a normal of the sheet passing through the leading end, and allows advance of the leading end by being pushed away by the leading end, wherein the guide includes a projection projecting toward a movement space for the sheet on a surface facing the movement space, and the projection abuts a center portion of the sheet in a longitudinal direction and generates a moment about an axis parallel to an advance direction of a portion that has come into contact with the projection.

Sheet conveyance apparatus and image forming apparatus including the same

A bolt is provided that has high strength and excellent hydrogen embrittlement resistance characteristics. A bolt according to an embodiment of the present invention consists of, in mass %, C: 0.32 to 0.39%, Si: 0.15% or less, Mn: 0.40 to 0.65%, P: 0.020% or less, S: 0.020% or less, Cr: 0.85 to 1.25%, Al: 0.005 to 0.060%, Ti: 0.010 to 0.050%, B: 0.0010 to 0.0030%, N: 0.0015 to 0.0080%, O: 0.0015% or less, Mo: 0 to 0.05%, V: 0 to 0.05%, Cu: 0 to 0.50%, Ni: 0 to 0.30%, and Nb: 0 to 0.05%, with the balance being Fe and impurities. The bolt satisfies Formula (1) and Formula (2), and has a tensile strength of 1000 to 1300 MPa and satisfies Formula (3).4.9&#x2264;10C+Si+2Mn+Cr+4Mo+5V&#x2264;6.1&#x2003;&#x2003;(1)Mn/Cr&#x2264;0.55&#x2003;&#x2003;(2)[dissolved Cr]/Cr&#x2265;0.70&#x2003;&#x2003;(3)

Bolt

An optional device is for an electrical machine. The optional device is mountable to the electrical machine without electrical connection to the electrical machine. The optional device includes a duct, an air flow sensor, an air purifier, and a controller. Through the duct, an air flow containing an exhaust gas from the electrical machine is guided. The air flow sensor is configured to detect presence or absence of the exhaust gas from the electrical machine. The air purifier is configured to purify the exhaust gas and discharge the purified exhaust gas into an atmosphere. The controller is configured to control an operation of the air purifier based on an output from the air flow sensor.

Optional device for electrical machine, and electrical machine

A high-strength bolt is provided that has high strength and excellent hydrogen embrittlement resistance characteristics. A bolt according to this invention has a chemical composition consisting of, in mass %, C: 0.22 to 0.40%, Si: 0.10 to 1.50%, Mn: 0.20 to less than 0.40%, P: 0.020% or less, S: 0.020% or less, Cr: 0.70 to 1.45%, Al: 0.005 to 0.060%, Ti: 0.010 to 0.045%, B: 0.0003 to 0.0040%, N: 0.0015 to 0.0080% and O: 0.0020% or less, with a balance being Fe and impurities, and satisfying Formula (1) and Formula (2), and with the high-strength bolt having a tensile strength of 1000 to 1300 MPa.0.50&#x2264;C+Si/10+Mn/5+5Cr/22&#x2264;0.85&#x2003;&#x2003;(1)Si/Mn&#x3e;1.0&#x2003;&#x2003;(2) Where, a content (mass %) of a corresponding element is substituted for each symbol of an element in Formula (1) and Formula (2).

High-strength bolt

A wire rod according to an aspect of the present invention has a predetermined chemical composition, a solute N is 0.0015% or less, a structure in an area from a surface of the wire rod to a depth of &#xbc; of a diameter of the wire rod in a cross section thereof includes 90.0 area % or more of pearlite, and 0 to 10.0 area % in total of bainite and ferrite, a total amount of martensite and cementite in the area from the surface of the wire rod to the depth of &#xbc; of the diameter of the wire rod is limited to 2.0 area % or less, and the calculated maximum size of TiN-type inclusions in a surface layer area of the wire rod is 50 &#x3bc;m or less.

Wire rod

Growing community of inventors

Tokyo, Japan

Naoki Matsui