公开(公告)号：US20240019323A1

公开(公告)日：2024-01-18

申请号：US18034899

申请日：2021-10-18

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  THE UNIVERSITY OF TOKYO

发明人： Takashi MATSUI ,  Kazuhide NAKAJIMA ,  Nobutomo HANZAWA ,  Ryota WADA ,  Hideaki MURAYAMA

IPC分类号： G01L1/24

CPC分类号： G01L1/242

摘要： An object of the present disclosure is to enable behavior of a linear structure in water to be estimated. The present disclosure is an apparatus that: expresses at least one parameter in a plurality of discrete values, and forecasts behavior of a linear structure by using each of the discrete values; acquires behavior of the linear structure detected using an optical fiber; calculates a likelihood between the forecasted behavior of the linear structure and the acquired behavior of the linear structure; updates at least one of the plurality of discrete values on the basis of the likelihood; and calculates behavior of the linear structure by using the updated plurality of discrete values.

公开(公告)号：US20230221487A1

公开(公告)日：2023-07-13

申请号：US18009784

申请日：2020-06-24

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Nobutomo HANZAWA ,  Takashi MATSUI ,  Yuto SAGAE ,  Kazuhide NAKAJIMA

IPC分类号： G02B6/02

CPC分类号： G02B6/02042 ,  G02B6/02342

摘要： The purpose of the present invention is to provide an optical fiber evaluation equipment and an optical fiber evaluation method that evaluate the center of a cladding of an MCF and a deviation of the center of each core of the MCF from a design value with ease and high accuracy.
The optical fiber evaluation equipment according to the present invention approximates the outside diameter of a cladding by a circle, based on a cross-sectional image of an MCF, and determines the center of the circle as the center of the cladding. In addition, the optical fiber evaluation equipment according to the present invention obtains the center coordinates of cores with an origin at the center of the circle, rotates the cross-sectional image so as to minimize a difference between the center coordinates and design coordinates of each core, and derives the minimum value thereof as the amount of deviation of the center of each core.

公开(公告)号：US20240335578A1

公开(公告)日：2024-10-10

申请号：US18574348

申请日：2021-07-02

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Tomohiro TANIGUCHI ,  Ayako IWAKI ,  Satoshi NARIKAWA ,  Takahito KIRIHARA ,  Kazuhide NAKAJIMA ,  Takashi MATSUI ,  Nobutomo HANZAWA ,  Yuto SAGAE ,  Chisato FUKAI ,  Hitoshi SESHIMO ,  Ryuji YAMAMOTO ,  Asuka MIYAKE

IPC分类号： A61L2/10 ,  A61L2/24 ,  B66B1/46

CPC分类号： A61L2/10 ,  A61L2/24 ,  A61L2202/11 ,  A61L2202/14 ,  B66B1/46

摘要： An object of the present invention is to provide an ultraviolet light irradiation system that is easy to operate and can avoid degradation of a material due to ultraviolet light. An ultraviolet light irradiation system according to the present invention includes: one ultraviolet light source unit 11 that generates ultraviolet light; an irradiation unit 13 that irradiates a desired portion (irradiation portion ste) with the ultraviolet light in a limited manner; an optical fiber 14 that propagates the ultraviolet light from the ultraviolet light source unit 11 to the irradiation unit 13; a sensing unit 16 that monitors a state of the irradiation portion ste and outputs the state as monitoring information; and an irradiation control unit 15 that controls output of the ultraviolet light from the ultraviolet light source unit 11 on the basis of the monitoring information.

公开(公告)号：US20240250757A1

公开(公告)日：2024-07-25

申请号：US18290383

申请日：2021-05-19

申请人： Nippon Telegraph and Telephone Corporation

发明人： Chisato Fukai ,  Tomohiro TANIGUCHI ,  Kazuhide Nakajima ,  Ayako IWAKI ,  Takashi Matsui ,  Nobutomo HANZAWA ,  Yuto SAGAE ,  Kazutaka HARA ,  Atsuko KAWAKITA

IPC分类号： H04B10/80 ,  G02B6/02 ,  G02B6/04 ,  G02B6/10

CPC分类号： H04B10/801 ,  G02B6/02042 ,  G02B6/04 ,  G02B6/102

摘要： An object of the present invention is to provide an ultraviolet optical transmission system in which cutting of an optical fiber or a complicated procedure is not necessary when an optical fiber is exchanged.
The present invention provides a system in which light with an ultraviolet band is transmitted along an optical transmission path formed of a quartz-based optical fiber, and in which an optical transmission unit is switched by a rotation mechanism in which an optical transmission path of one of an optical coupling unit rotates about an axis, the optical coupling unit including an optical transmission path including a plurality of optical transmission units on the same circumference from a center on an end surface of the optical coupling unit; an optical transmission path in which the optical transmission units are arranged on the same circumference as a circumference on which the plurality of optical transmission units are arranged; two ferrules each containing the two optical transmission paths; and a cylindrical sleeve in which the two ferrules are inserted in a hollow.

公开(公告)号：US20230270898A1

公开(公告)日：2023-08-31

申请号：US18018038

申请日：2020-10-23

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Takashi MATSUI ,  Kazuhide NAKAJIMA ,  Nobutomo HANZAWA ,  Yuto SAGAE ,  Chisato FUKAI ,  Ayako IWAKI ,  Tomohiro TANIGUCHI ,  Kazutaka HARA ,  Atsuko KAWAKITA

IPC分类号： A61L2/10 ,  A61L9/20

CPC分类号： A61L2/10 ,  A61L9/20 ,  A61L2202/11 ,  A61L2202/15

摘要： An object of the present invention is to provide an ultraviolet light irradiation system and a decontamination method that can perform decontamination economically without any input from a user.
The ultraviolet light irradiation system forms a linear or planar ultraviolet light irradiation space by spatially bundling a plurality of ultraviolet light beams with high energy density or moving the ultraviolet light with high energy density at high speed. The ultraviolet light irradiation system can decontaminate a human body and clothing simply by passing through the space. Further, since the ultraviolet light irradiation system performs decontamination in the space, bacteria and viruses emitted from a carrier are not passed through the space.

公开(公告)号：US20240102886A1

公开(公告)日：2024-03-28

申请号：US18039600

申请日：2020-12-11

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Nobutomo HANZAWA ,  Takashi MATSUI ,  Yuto SAGAE ,  Kazuhide NAKAJIMA

IPC分类号： G01M11/00 ,  C03C13/04

CPC分类号： G01M11/33 ,  C03C13/04 ,  C03C2213/00

摘要： An object of the present invention is to provide an evaluation method and an evaluation device for easily determining whether or not a structural parameter of a multi-core fiber satisfies a desired connection loss value (a specification). The evaluation method according to the present invention includes a step of measuring center coordinates of each core with the center coordinates when a clad is approximated by a circle as an origin in an observed cross-sectional structure of the multi-core fiber to be objected, obtaining a length of a line segment connecting the origin and the center of each core and an angle formed by two line segments connecting the origin and two adjacent cores, and judging whether or not a desired connection loss characteristic is satisfied on the basis of whether or not the values satisfy a predetermined determination formula.

公开(公告)号：US20230390436A1

公开(公告)日：2023-12-07

申请号：US18032514

申请日：2020-10-21

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Tomohiro TANIGUCHI ,  Ayako IWAKI ,  Kazuhide NAKAJIMA ,  Nobutomo HANZAWA ,  Takashi MATSUI ,  Yuto SAGAE ,  Chisato FUKAI

IPC分类号： A61L2/10

CPC分类号： A61L2/10 ,  A61L2202/11

摘要： An object of the present invention is to provide an ultraviolet light irradiation system and an ultraviolet light irradiation method which are not limited in an ultraviolet light irradiation region and can be introduced economically. The present ultraviolet light irradiation system is a system configured to connect a single ultraviolet light source part and an irradiation part installed in the vicinity of an object place to be sterilized or the like by the optical cable formed by bundling a plurality of optical fibers (the single-core or the multi-core) or the multi-core optical fiber. Since the optical fiber is very thin and does not require power supply for transmitting the ultraviolet rays, even in a fine place where a person or a robot cannot enter, the ultraviolet light can be irradiated by laying the optical fiber or the optical cable.

公开(公告)号：US20230163554A1

公开(公告)日：2023-05-25

申请号：US17913097

申请日：2020-03-30

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Shinichi AOZASA ,  Yoko YAMASHITA ,  Takashi MATSUI ,  Kazuhide NAKAJIMA ,  Taiji SAKAMOTO ,  Nobutomo HANZAWA ,  Noriyuki ARAKI ,  Ryota IMADA ,  Yuto SAGAE

IPC分类号： H01S3/067 ,  G02B6/32 ,  G02B3/08

CPC分类号： H01S3/06754 ,  G02B3/08 ,  G02B6/32 ,  H01S3/1608

摘要： An object of the present disclosure is to implement a clad-excitation rare-earth-added optical fiber amplifier with a high light-to-light conversion efficiency. The present disclosure is an optical fiber amplifier having, in a longitudinal direction of a rare-earth-added optical fiber, a light collection structure that collets an excitation light, which propagates through a clad portion, into a core portion.

公开(公告)号：US20240216559A1

公开(公告)日：2024-07-04

申请号：US18562769

申请日：2021-06-04

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Tomohiro TANIGUCHI ,  Satoshi NARIKAWA ,  Ayako IWAKI ,  Takahito KIRIHARA ,  Kazuhide NAKAJIMA ,  Takashi MATSUI ,  Nobutomo HANZAWA ,  Yuto SAGAE ,  Chisato FUKAI

IPC分类号： A61L2/10 ,  A61L2/26 ,  A61L9/20

CPC分类号： A61L2/10 ,  A61L2/26 ,  A61L9/20 ,  A61L2202/11

摘要： An object of the present invention is to provide an ultraviolet light irradiation system and an ultraviolet light irradiation method having a P-MP configuration capable of obtaining a predetermined effect such as sterilization.
An ultraviolet light irradiation system 301 according to the present invention includes an ultraviolet light source unit 11 that generates ultraviolet light, N (N is a natural number) irradiation units 13 that irradiate a desired site (irradiation target region ste) with the ultraviolet light, an optical switch 12 that switches the ultraviolet light to each of paths 14 to the irradiation units 13, and a switching control unit 15 that controls a switching operation of the optical switch 12 so as to give an opportunity to be supplied with an integrated light amount per unit time equal for each of the paths 14 on the basis of a transmission loss of the ultraviolet light for each of the paths 14 and an irradiation area where the irradiation unit 13 irradiates the ultraviolet light.

公开(公告)号：US20240157003A1

公开(公告)日：2024-05-16

申请号：US18282197

申请日：2021-04-05

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Ayako IWAKI ,  Takahito KIRIHARA ,  Tomohiro TANIGUCHI ,  Satoshi NARIKAWA ,  Kazuhide NAKAJIMA ,  Takashi MATSUI ,  Nobutomo HANZAWA ,  Yuto SAGAE ,  Chisato FUKAI

IPC分类号： A61L2/10 ,  A61L2/24 ,  A61L2/26

CPC分类号： A61L2/10 ,  A61L2/24 ,  A61L2/26 ,  A61L2202/11 ,  A61L2202/14

摘要： An object of the present invention is to provide an ultraviolet light irradiation system and an ultraviolet light irradiation method which can perceive a state of a region where ultraviolet light is irradiated to output/block the ultraviolet light.
An ultraviolet light irradiation system 301 according to the present invention includes an ultraviolet light source unit 11 that produces ultraviolet light,



an N (N is a natural number) irradiation unit 13 that irradiates an irradiation target region Ar with the ultraviolet light, a sensor unit 31 that detects whether or not an object that should avoid exposure is present in the irradiation target region Ar, and a blocking unit 30 that stops, in a case where the object that should avoid exposure is present in the irradiation target region Ar, irradiation of the ultraviolet light from the irradiation unit 13 to the irradiation target region Ar.