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公开(公告)号：US12085832B2
公开(公告)日：2024-09-10
申请号：US17609221
申请日：2019-05-29
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yuichi Akage , Takashi Sakamoto , Soichi Oka , Sohan Kawamura , Masahiro Ueno
CPC classification number: G02F1/29 , G02F1/0322 , G02F1/0311
Abstract: In an embodiment, an optical deflection device includes: an electro-optic crystal comprising KTa1-xNbxO3, the electro-optic crystal having a first surface and a second surface, the first surface and the second surface facing each other; a first electrode on the first surface of the electro-optic crystal; a second electrode on the second surface of the electro-optic crystal; a power source configured to output a control voltage for forming an electric field inside the electro-optic crystal via the first electrode and the second electrode; and a light source configured to emit a pulse laser to be incident on the electro-optic crystal along an optical axis, the optical axis substantially perpendicular to a direction of the electric field formed by the control voltage, wherein a peak power density of the pulse laser output from the light source at a light incidence surface of the electro-optic crystal is less than 800000 W/cm2.
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公开(公告)号：US20240280843A1
公开(公告)日：2024-08-22
申请号：US18007863
申请日：2020-06-12
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Yurina Tanaka , Yuichi Akage , Takashi Sakamoto , Soichi Oka
CPC classification number: G02F1/0305 , G02F1/213 , G02F1/23
Abstract: A temperature regulating unit is attached to a first incident surface of a first component through a first transparent electrode. The temperature regulating unit is composed of a Peltier element. The temperature regulating unit includes an opening through which the target light can pass. The temperature regulating unit has, for example, a rectangular parallelepiped outer shape in which a surface perpendicular to an optical axis is square-shaped. The opening is formed to penetrate through the temperature regulating unit in a direction perpendicular to the optical axis and has a circular shape in a plan view.
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公开(公告)号：US20240201161A1
公开(公告)日：2024-06-20
申请号：US18555806
申请日：2021-05-21
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Shingo Mineta , Shota Oki , Mamoru Mizunuma , Soichi Oka
Abstract: A first estimation function unit estimates, on the basis of a particle diameter of soil of a target land, a relationship between an underground depth of the land and an oxygen concentration in soil. A second estimation function unit estimates, on the basis of a corrosion rate or a corrosion amount of a target metal near a ground surface of the land and the relationship estimated by the first estimation function unit, a relationship between the underground depth and the corrosion rate or the corrosion amount in the land from a relationship between the oxygen concentration and the corrosion rate or the corrosion amount. A third estimation function unit estimates a corrosion state of a structure constituted of the metal buried in target ground in the land from the relationship estimated by the second estimation function unit.
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公开(公告)号：US20240150613A1
公开(公告)日：2024-05-09
申请号：US18257545
申请日：2020-12-15
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Azusa Ishii , Takashi Miwa , Shingo Mineta , Soichi Oka
IPC: C09D201/00 , C09D1/00
CPC classification number: C09D201/00 , C09D1/00
Abstract: A coating material is a coating material used for applying a coating film formed on a coating made of a zinc-containing material formed in contact with a surface of a metal material and is composed of a binder, a first inorganic material, and a second inorganic material. The binder is composed of an organic resin and does not contain metallic zinc and a zinc alloy. The first inorganic material is composed of a sulfate having a solubility lower than 5 g/100 mL with respect to water. The second inorganic material is soluble in water, exhibits alkalinity if dissolved in water, and has a solubility lower than 5 g/100 mL with respect to water.
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公开(公告)号：US11934936B2
公开(公告)日：2024-03-19
申请号：US16982009
申请日：2019-04-11
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Shiori Konisho , Takuya Otsuka , Soichi Oka
CPC classification number: G06N3/04 , G02F1/0147 , G02F3/00
Abstract: An optical operational element which enables a multilayered optical neural network to be constructed without using an optical amplifier is provided. The optical operational element includes: a photothermal conversion unit 30 which converts light energy of input light A into thermal energy; a light intensity variation unit 20 which is in contact with the photothermal conversion unit 30 and which varies, in accordance with a temperature variation accompanying heat generation or heat absorption by the photothermal conversion unit 30, intensity of external light B that is introduced from the outside; and a housing unit 10 which houses the light intensity variation unit 20 and which introduces the external light B from one side and outputs output light C obtained by attenuating intensity of the external light B to the outside on an opposite side to the one side.
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Patent Agency Ranking
公开(公告)号：US20230273446A1
公开(公告)日：2023-08-31
申请号：US18040562
申请日：2020-08-19
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Sohan Kawamura , Yurina Tanaka , Takashi Sakamoto , Masahiro Ueno , Yuichi Akage , Soichi Oka
IPC: G02B27/09
CPC classification number: G02B27/0944 , G02B2207/117
Abstract: A diffraction element device includes a diffractive element and a power source, the diffractive element includes a substrate and a plurality of multi-step structures, each of the multi-step structures is composed of a plurality of steps, an electrode is provided at a part of the multi-step structures, a piezoelectric material or an electrostrictive material is included in a part of the multi-step structures, the power source is connected to the electrode or the substrate, and a height of the multi-step structures changes due to a voltage applied from the power source.
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7.发明申请公开(公告)号：US20220380879A1
公开(公告)日：2022-12-01
申请号：US17774067
申请日：2019-11-06
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Takashi Miwa , Azusa Ishii , Masamitsu Watanabe , Soichi Oka
Abstract: A zinc spraying material comprises a zinc material containing zinc; and a sulfate salt whose solubility in water is 1/8 or more of the solubility of calcium sulfate. The content of the sulfate salt in the zinc spraying material can be 0.006 to 0.14 mol based on 100 g of the content of the zinc material. Note that the sulfate salt can be at least one of potassium sulfate, sodium sulfate, magnesium sulfate, calcium sulfate, ferric sulfate, ferrous sulfate, lithium sulfate, calcium sulfate, and aluminum sulfate. Also, the zinc material is zinc. Alternatively, the zinc material can also be a zinc alloy containing zinc as the main component and at least one metal selected from aluminum and magnesium.
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公开(公告)号：US20220316821A1
公开(公告)日：2022-10-06
申请号：US17630743
申请日：2019-08-01
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Sohan Kawamura , Takashi Sakamoto , Yuichi Akage , Soichi Oka
Abstract: To cool a cooling target with liquid, a cooling apparatus includes a cooling medium holding portion configured to support the cooling target and hold a flow passage of the cooling medium, and a device configured to drive the cooling medium. The section where the cooling medium comes into contact with the cooling target in the flow passage of the cooling medium holding portion, the section where the cooling medium flows in, and the section where the cooling medium flows out have different flow passage structures so that the cooling medium passes at high speed while in contact with a cooling surface of the cooling target to achieve high cooling efficiency.
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公开(公告)号：US20220082675A1
公开(公告)日：2022-03-17
申请号：US17420410
申请日：2020-02-04
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Masahiro Ueno , Yuichi Akage , Soichi Oka
IPC: G01S7/4915 , G01S7/481 , G01S17/32 , G01S7/497
Abstract: A range finding apparatus includes an optical system including a correction mirror disposed near an object, and a PDs that detects reflected light obtained when light emitted from a light source and cyclically modulated in intensity is reflected by the object and a correction mirror, and a signal processing device including a range finding device that outputs a distance signal Ln indicating a distance to the object, based on a time period until the reflected light is detected by the PDs, a correction mirror range finding device that outputs a distance signal Lcor indicating a distance to the correction mirror, and a distance correction device that corrects the distance signal Ln, based on the distance signal Lcor, and outputs a distance signal Ln, cor indicating the distance to the object.
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公开(公告)号：US11237136B2
公开(公告)日：2022-02-01
申请号：US16962182
申请日：2019-02-01
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Masanari Shoji , Soichi Oka
Abstract: A transmission probe for transmitting guided waves propagating in the longitudinal direction of a long member and a reception probe for receiving guided waves derived from the guided waves reflected from a predetermined portion of the long member are set on the long member. The guided waves received by the reception probe include a guided wave serving as a second signal that is noise of a desired first signal. The guided wave serving as the second signal having nodes in a circumferential direction distribution of displacement in a specific direction in the circumferential surface of the long member, and the guided waves transmitted by the transmission probe are formed such that the displacement of the guided wave serving as the second signal in the specific direction becomes zero at a specific circumferential surface position of the long member. A probe setting method comprising the steps of: setting the transmission probe for transmitting the guided waves on the circumferential surface of the long member; and setting the reception probe at a position at which the displacement of the guided wave serving as the second signal in the specific direction becomes zero on the circumferential surface of the long member.
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