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公开(公告)号：US11722225B2
公开(公告)日：2023-08-08
申请号：US17795212
申请日：2020-01-27
申请人： Shimadzu Corporation
发明人： Naoki Nishimura , Koji Tojo
CPC分类号： H04B10/80
摘要： A first optical communication device is provided with a laser light source 3 for emitting communication light CL and a transmitting optical fiber 11 arranged in water WA and having a light incident end portion 14 on which the communication light CL is incident. The transmitting optical fiber 11 transmits the communication light CL incident on the light incident end portion 14 toward the tip end portion 15. The transmitting optical fiber 11 is provided with a core part 21 configured to transmit the communication light CL from the light incident end portion 14 toward the tip end portion 15 and a clad part 23 covering the core part, the clad part being configured to emit at least a part of the communication light CL that transmits the core part 21 from a side surface of the transmitting optical fiber 11.
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公开(公告)号：US11698273B2
公开(公告)日：2023-07-11
申请号：US17170106
申请日：2021-02-08
申请人： Shimadzu Corporation
发明人： Naoki Nishimura , Kenta Chinomi
IPC分类号： G01D5/14
CPC分类号： G01D5/14
摘要： The magnetic detection system 100 is provided with a magnetic sensor 1, a storage unit 5, a first determination unit 42 for outputting whether or not the magnetic body 90 has passed as a first determination result 20, a second determination unit 43 for outputting whether or not the magnetic body has passed as a second determination result 21, a display unit 6 for displaying (notifying) the first determination result and the second determination result. The second determination unit is configured to have higher determination accuracy than the first determination unit.
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公开(公告)号：US11658751B2
公开(公告)日：2023-05-23
申请号：US17766171
申请日：2019-10-03
发明人： Naoki Nishimura , Takao Sawa
CPC分类号： H04B13/02
摘要： This underwater optical wireless communication system (100) is provided with a plurality of moving bodies (1) capable of moving underwater. The plurality of moving bodies each includes a plurality of optical wireless communication units (2) each configured to perform bidirectional communication between the plurality of moving bodies using communication light beams (30) having wavelengths different from each other in a plurality of directions which are mutually opposite directions. The plurality of optical wireless communication units is configured to perform bidirectional communication between the plurality of moving bodies using communication light beams, the communication beams having the same wavelength with respect to each of the plurality of directions.
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公开(公告)号：US10566763B2
公开(公告)日：2020-02-18
申请号：US16292659
申请日：2019-03-05
申请人： SHIMADZU CORPORATION
发明人： Ryosuke Nishi , Koji Tojo , Naoki Nishimura
摘要： An underwater laser source is used in water and comprises a water pressure-resistant cylinder A having a light emission window 4, and the water pressure-resistant cylinder A comprises a plurality of semiconductor lasers 11a-11f, and converging lens 13 that converges each laser light from the plurality of semiconductor lasers 11a-11f, and emits converged each laser light to the light emission window 4.
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公开(公告)号：US11929786B2
公开(公告)日：2024-03-12
申请号：US17772075
申请日：2019-11-08
发明人： Naoki Nishimura , Takao Sawa
CPC分类号： H04B10/60 , G02B6/4206 , H04B10/80
摘要： This optical communication device (1) is provided with: a plurality of light-receiving elements (11) configured to receive communication light, the plurality of light-receiving elements being provided so as to correspond to a plurality of channels; and a controller (15) configured to perform control to invalidate output from a light-receiving element that has received high-intensity light higher in light intensity than a predetermined value among the plurality of light-receiving elements.
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公开(公告)号：US12034488B2
公开(公告)日：2024-07-09
申请号：US17795345
申请日：2020-01-27
申请人： Shimadzu Corporation
发明人： Keiko Sato , Naoki Nishimura
IPC分类号： H04B10/80 , G01S7/4912 , H04B10/11 , H04B10/112 , H04B10/69 , G01S17/88
CPC分类号： H04B10/69 , G01S7/4918 , H04B10/11 , H04B10/112 , H04B10/80 , G01S17/88
摘要： An optical communication device 1 is provided with: a plurality of light-receiving elements 11 each configured to receive light and output a light detection signal; a plurality of optical fibers 13 provided to correspond to the plurality of light-receiving elements 11, respectively, the plurality of optical fibers each being configured to guide the light to the corresponding light-receiving element 11; a plurality of amplifiers 18 provided to correspond to the plurality of light-receiving elements 11, respectively, the plurality of amplifiers each being configured to generate optical communication information by performing signal processing on the light detection signal; a light intensity information collection unit 25 configured to collect intensity of the light received by each of the plurality of optical fibers 13 as light intensity information; an optical fiber identification unit 27 configured to identify the optical fiber 13 that is receiving relatively strong light out of the plurality of optical fibers 13, based on the light intensity information La to Le collected by the light intensity information collection unit 25; and a switch controller 29 configured to control to turn on the amplifier 18, the amplifier 18 being provided to correspond to the optical fiber 13 identified by the optical fiber identification unit 27.
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公开(公告)号：US11956012B2
公开(公告)日：2024-04-09
申请号：US17792517
申请日：2020-01-27
发明人： Keiko Sato , Naoki Nishimura , Takao Sawa
IPC分类号： H04B10/116 , H04B10/112 , H04B10/61 , H04B10/80 , H04B13/02
CPC分类号： H04B10/116 , H04B10/1129 , H04B10/614 , H04B10/801 , H04B13/02
摘要： The present invention relates to a fiber branch structure for spatial optical communication for transmitting information by emitting communication light. The fiber branch structure is provided with: a light emitter configured to emit communication light; a light emission controller configured to control the light emitter; an optical fiber configured to transmit the light emitted from the light emitter; a distributor configured to distribute the light, the distributer being optically coupled to an output terminal of the optical fiber; and an optical fiber group optically coupled to a plurality of output terminals of the distributor. According to the present invention, a communication area can be established without blind spots. That is, the fiber branch structure for spatial optical communication according to the present invention includes an optical fiber group optically coupled to a plurality of output terminals of the distributor. A communication area can be established more assuredly by such an optical fiber group, which prevents the optical communication from being interrupted.
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