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    Method for producing glass material and apparatus for producing glass material
    2.
    发明授权
    Method for producing glass material and apparatus for producing glass material 有权

    公开(公告)号：US11492283B2

    公开(公告)日：2022-11-08

    申请号：US16820905

    申请日：2020-03-17

    Applicant: NIPPON ELECTRIC GLASS CO., LTD.

    Inventor： Futoshi Suzuki ,  Osamu Odani

    IPC: C03B19/10

    Abstract: Provided is a method for producing a glass material by a containerless levitation technique, which enables production of a large-sized glass material. The method includes the steps of: preparing a forming member and a cover member 20, the forming member including a gas jetting portion 11 in which a plurality of gas jet holes 12 for use in levitating a block of glass raw material are formed, the cover member 20 which is capable of covering a peripheral portion of a gas jetting surface 13 of the gas jetting portion 12 and in which a controlling surface 21 controlling, near the peripheral portion of the gas jetting surface 13, a flow of gas jetted through the gas jet holes 12 is formed and an opening 25 capable of releasing the gas to outside is formed; placing the block of glass raw material on top of the gas jetting surface 13 and covering the peripheral portion of the gas jetting surface 13 with the cover member 20; and heating the block of glass raw material to melting while holding the block of glass raw material levitated by jetting the gas through the gas jet holes 12 and then cooling the melted block of glass raw material.

    Faraday rotator and magneto-optical element
    5.
    发明授权
    Faraday rotator and magneto-optical element 有权

    公开(公告)号：US11971617B2

    公开(公告)日：2024-04-30

    申请号：US17048117

    申请日：2019-03-07

    Applicant: NIPPON ELECTRIC GLASS CO., LTD.

    Inventor： Futoshi Suzuki

    IPC: G02F1/09 ,  C03C3/15 ,  C03C4/00 ,  G02B27/28

    CPC classification number: G02F1/093 ,  C03C3/15 ,  C03C4/00 ,  G02B27/28 ,  G02F2202/09

    Abstract: A Faraday rotator includes a magnetic circuit including first to third magnetic materials each provided with a through hole through which light passes, and a Faraday element disposed in the through hole. When a direction where light passes through the through hole is defined as a direction of an optical axis, the first magnetic material is magnetized in a direction perpendicular to the direction of the optical axis, the second magnetic material is magnetized in a direction parallel to the direction of the optical axis, and the third magnetic material is magnetized in a direction perpendicular to the direction of the optical axis, and a length of the Faraday element along the direction of the optical axis is shorter than a length of the second magnetic material along the direction of the optical axis.

    Method for producing glass material and apparatus for producing glass material
    8.
    发明授权
    Method for producing glass material and apparatus for producing glass material 有权

    公开(公告)号：US10737963B2

    公开(公告)日：2020-08-11

    申请号：US15763872

    申请日：2016-11-14

    Applicant: NIPPON ELECTRIC GLASS CO., LTD.

    Inventor： Futoshi Suzuki ,  Osamu Odani

    IPC: C03B19/10

    Abstract: Provided is a method for producing a glass material by a containerless levitation technique, which enables production of a large-sized glass material. The method includes the steps of: preparing a forming member and a cover member 20, the forming member including a gas jetting portion 11 in which a plurality of gas jet holes 12 for use in levitating a block of glass raw material are formed, the cover member 20 which is capable of covering a peripheral portion of a gas jetting surface 13 of the gas jetting portion 12 and in which a controlling surface 21 controlling, near the peripheral portion of the gas jetting surface 13, a flow of gas jetted through the gas jet holes 12 is formed and an opening 25 capable of releasing the gas to outside is formed; placing the block of glass raw material on top of the gas jetting surface 13 and covering the peripheral portion of the gas jetting surface 13 with the cover member 20; and heating the block of glass raw material to melting while holding the block of glass raw material levitated by jetting the gas through the gas jet holes 12 and then cooling the melted block of glass raw material.

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