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    Method and apparatus for manufacturing preform for fluoride glass fiber
    221.
    发明公开
    Method and apparatus for manufacturing preform for fluoride glass fiber 失效
    Verfahren und Vorrichtung zum Herstellen einer VorformfürFluorglasfasern。

    公开(公告)号：EP0326401A2

    公开(公告)日：1989-08-02

    申请号：EP89300797.1

    申请日：1989-01-27

    Applicant: KOKUSAI DENSHIN DENWA KABUSHIKI KAISHA

    Inventor： Mimura, Yoshinori ,  Noda, Yukio ,  Norimatsu, Naoki ,  Tokiwa, Hideharu ,  Shinbori, Osamu

    IPC: C03B37/012 ,  C03B19/02

    CPC classification number: C03B5/225 ,  C03B5/021 ,  C03B37/01268 ,  C03B2201/82

    Abstract: A method and apparatus for manufacturing a preform for a fluoride glass fiber.
    Cooling means (13) and a liquid reservoir (14) are provided in association with a cylindrical vessel (1) open at both ends, and a crucible open (3) at both ends is disposed in the cylindrical vessel. Glass for clad and for core (2,4) are loaded into the cylindrical vessel and the crucible, respectively, with their lower open ends plugged, and are made molten.
    The clad glass melt is then cooled and when the outer portion of the clad glass melt has solidified with its inner portion still molten; the plugged lower open ends of the cylindrical vessel and the crucible are opened to let the inner portion of the clad glass melt run out into the liquid reservoir, and to introduce the core glass melt into the void from which the clad glass melt has run out. The glass is then cooled and solidified in its entirety, thereby forming a core-clad layer structure.

    Abstract translation: 一种用于制造氟化物玻璃纤维预制棒的方法和装置。 冷却装置（13）和液体储存器（14）与在两端开口的圆柱形容器（1）相关联地设置，并且在两端的坩埚打开（3）设置在圆柱形容器中。 用于包层和芯（2,4）的玻璃分别装入圆柱形容器和坩埚中，并且其下开口端被堵塞并被熔化。 然后包覆玻璃熔体被冷却，并且当包覆玻璃熔体的外部部分已经固化，其内部部分仍然熔融时; 打开圆柱形容器的堵塞的下开口端，并将坩埚打开以使包层玻璃熔体的内部熔化物流出到储液器中，并将核心玻璃熔体引入包覆玻璃熔体已经耗尽的空隙中 。 然后将玻璃全部冷却并固化，从而形成芯包层结构。

    Optical fiber for infrared rays and its manufacture
    228.
    发明专利
    Optical fiber for infrared rays and its manufacture 失效
    用于红外光纤的光纤及其制造

    公开(公告)号：JPS59116149A

    公开(公告)日：1984-07-04

    申请号：JP22493482

    申请日：1982-12-23

    Applicant: Kokusai Denshin Denwa Co Ltd

    Inventor： MIMURA HIDENORI

    IPC: C03C3/32 ,  C03B37/023 ,  C03C4/10 ,  C03C4/12 ,  C03C13/04 ,  G02B6/00 ,  G02B6/02

    CPC classification number: C03C13/042 ,  C03B37/023 ,  C03B2201/82

    Abstract: PURPOSE:To manufacture an optical fiber for infrared rays with a small loss due to scattering by coating a core of ZrF4 glass having a specified composition with a layer of fluoride glass having a specified composition and by carrying out drawing at the m.p. of the core or above. CONSTITUTION:ZrF4 glass 2 having a composition consisting of, by mole, 50- 70% ZrF4, 25-40% BaF2, 0-10% LnF3 (Ln is Y or a rare earth element), 0- 8% AlF3 and 0-8% one or more among LiF, NaF and PbF2 and fluoride glass 1 consisting of 25-50% AlF3, 30-60% one or more among BaF2, SrF2, CaF2 and MgF2, 0-25% LnF3 (Ln is Y or a rare earth element) and 0-10% one or more among PbF2, LiF and NaF are put in a crucible 5 so that a core of the glass 2 is coated with a layer of the glass 1, and they are heated with a heater 6 to the m.p. of the core 2 or above at which the layer 1 shows viscosity suitable for drawing. Drawing is then carried out, and the resulting fiber is wound around a winding drum 8 through a capstan 7.

    Abstract translation: 目的：制造具有特定组成的ZrF 4玻璃核的散射损耗小的红外线用光纤，具有特定成分的氟化物玻璃层，并以m.p.进行拉伸。 的核心或以上。 构成：ZrF4玻璃2具有摩尔比为50-70％ZrF4，25-40％BaF2,0-10％LnF3（Ln是Y或稀土元素），0-8％AlF3和0- BaF 2，SrF 2，CaF 2和MgF 2中的25-50％的AlF 3，30-60％的一种或多种的LiF，NaF和PbF 2和氟化物玻璃1中的一种或多种，​​0-25％的LnF 3（Ln是Y或 稀土元素）和PbF 2，LiF和NaF中的0-10％的一种或多种放入坩埚5中，使得玻璃2的芯涂覆有玻璃层1，并用加热器6加热 到mp 的芯2或更高层，其中层1显示适于拉伸的粘度。 然后进行拉伸，所得到的纤维通过绞盘7卷绕在卷筒8上。

    Manufacture of fluoride glass for optical fiber
    230.
    发明专利
    Manufacture of fluoride glass for optical fiber 失效
    用于光纤的氟化玻璃的制造

    公开(公告)号：JPS593039A

    公开(公告)日：1984-01-09

    申请号：JP10837682

    申请日：1982-06-25

    Applicant: Nippon Telegr & Teleph Corp

    Inventor： OOISHI YASUTAKE

    IPC: C03B37/014 ,  C03B1/00 ,  C03B5/00 ,  C03B8/00 ,  C03B37/012 ,  C03C1/02 ,  C03C13/04 ,  G02B6/00

    CPC classification number: C03B37/01268 ,  C03B2201/82

    Abstract: PURPOSE:To manufacture the titled glass having a very low concn. of OH groups, by pretreating finely powdered starting materials for fluoride glass with HF, F3, BF3, CF4, Cl2, CCl4 or SOCl2 and by melting the pretreated materials with an electric furnace. CONSTITUTION:Finely powdered starting materials 10 for fluoride glass are charged into a platinum crucible 2, and the crucible 2 is mounted on a stage 8. A cover 3 is put on the crucible 2, and a pipe attached to the cover 3 is connected to an exhaust system. A platinum crucible 6 is mounted on a crucible stand 7 below an electric furnace 1, and the stand 7 is moved upward to insert the crucible 6 into the crucible 2. After heating the materials 10 with the furnace 1, a gas for an OH group removing reaction is introduced from a pipe 4 to cause said reaction. HF, F2, BF3, CF4, Cl2, CCl4 or SOCl2 is used as the gas. After finishing the reaction, the materials 10 freed of OH groups are melted by heating with the furnace 1 and allowed to flow in the crucible 6 through holes 11. The resulting molten glass is cast in a casting mold, annealed in the mold, and slowly cooled to manufacture a fluoride glass preform.

    Abstract translation: 目的：制造具有很低浓度的标题玻璃。 的OH基，通过用HF，F3，BF3，CF4，Cl2，CCl4或SOCl2预处理氟化玻璃的微粉末原料，并用电炉熔化预处理的材料。 构成：将用于氟化物玻璃的细粉末原料10装入铂坩埚2中，将坩埚2安装在载物台8上。将盖3放在坩埚2上，将附着在盖3上的管连接到 排气系统。 将铂坩埚6安装在电炉1下方的坩埚架7上，并将支架7向上移动，将坩埚6插入坩埚2中。在用炉1加热材料10之后，将OH气体 从管4引入去除反应以引起所述反应。 使用HF，F2，BF3，CF4，Cl2，CCl4或SOCl2作为气体。 反应完成后，通过与炉1的加热熔化除去OH基的材料10，并使其通过孔11在坩埚6中流动。将所得熔融玻璃浇铸在铸模中，在模具中退火，并缓慢地 冷却以制造氟化物玻璃预制件。

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