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44 条记录 (耗时 0.023 秒)

    Method for elongating glass preform
    1.
    发明授权
    Method for elongating glass preform 失效
    拉伸玻璃预制件的方法

    公开(公告)号：US5755849A

    公开(公告)日：1998-05-26

    申请号：US756483

    申请日：1996-11-26

    申请人： Sumio Hoshino ,  Yuichi Ohga ,  Masumi Ito ,  Toshio Danzuka ,  Tatsuhiko Saito

    发明人： Sumio Hoshino ,  Yuichi Ohga ,  Masumi Ito ,  Toshio Danzuka ,  Tatsuhiko Saito

    IPC分类号： C03B23/047 ,  C03B37/012 ,  C03B37/014 ,  C03B37/07

    CPC分类号： C03B23/047 ,  C03B37/0124 ,  C03B37/01466

    摘要： The present invention relates to a method for precisely elongating a glass preform of an optical fiber body having a desired outer diameter. In this method, a predetermined part of the glass preform is elongated as tensile stress is applied to one end of the glass preform while a predetermined part of the glass preform is heated and softened successively from one end toward the other end of the glass preform. In this elongating operation, while the outer diameter of the softening portion of the glass preform is measured, the tensile stress is adjusted such that the outer diameter of the softening portion coincides with a preset value of the control outer diameter. In particular, this method is characterized in that the preset value of the control outer diameter is changed at least during a predetermined period until termination of elongation or during a predetermined period from the start of elongation.

    摘要翻译： 本发明涉及一种精确拉伸具有所需外径的光纤体的玻璃预制件的方法。 在这种方法中，玻璃预成型件的预定部分是细长的，因为拉伸应力被施加到玻璃预制件的一端，同时玻璃预制件的预定部分从玻璃预制件的一端向另一端依次加热软化。 在该拉伸操作中，在测量玻璃预制件的软化部分的外径的同时，调整拉伸应力使得软化部分的外径与控制外径的预设值一致。 特别地，该方法的特征在于，控制外径的预设值至少在延伸终止的预定时段期间或从伸长开始的预定时段期间改变。

    Apparatus for vitrifying soot preform for optical fiber
    2.
    发明授权
    Apparatus for vitrifying soot preform for optical fiber 失效
    玻璃化用于光纤的烟灰预制件的装置

    公开(公告)号：US5513983A

    公开(公告)日：1996-05-07

    申请号：US255875

    申请日：1994-06-08

    申请人： Masumi Ito ,  Ichiro Tuchiya ,  Toshio Danzuka ,  Yuichi Ohga ,  Sumio Hoshino

    发明人： Masumi Ito ,  Ichiro Tuchiya ,  Toshio Danzuka ,  Yuichi Ohga ,  Sumio Hoshino

    IPC分类号： C03B8/00 ,  C03B8/04 ,  C03B20/00 ,  C03B37/014 ,  F27B5/04

    CPC分类号： C03B37/0146 ,  Y02P40/57

    摘要： An apparatus for vitrifying a soot preform from which an optical fiber is produced by drawing, is composed of a main vacuum chamber 20 in which a muffle tube 70 for vitrifying the soot preform PF is located, and an auxiliary vacuum chamber 30 mounted on the main vacuum chamber 20 and communicated therewith through a passage, and a gate valve 60 for opening and closing the passage. The muffle tube 70 has a inner surface covered with silicon carbide layer 70a.

    摘要翻译： 用于玻璃化烟灰预制件的装置由拉丝制成光纤的装置由主真空室20组成，主真空室20中安装用于玻璃化烟灰预成型体PF的马弗管70和安装在主体上的辅助真空室30 真空室20并通过通道与其连通，以及用于打开和关闭通道的闸阀60。 马弗管70具有覆盖有碳化硅层70a的内表面。

    Process for production of glass preform for optical fiber including consolidating in a furnace with a temperature gradient
    4.
    发明授权
    Process for production of glass preform for optical fiber including consolidating in a furnace with a temperature gradient 失效
    生产用于光纤的玻璃预制棒的方法，包括在具有温度梯度的炉中固结

    公开(公告)号：US5693115A

    公开(公告)日：1997-12-02

    申请号：US204100

    申请日：1994-03-02

    申请人： Masumi Ito ,  Toshio Danzuka ,  Yuichi Ohga ,  Sumio Hoshino ,  Ichiro Tsuchiya

    发明人： Masumi Ito ,  Toshio Danzuka ,  Yuichi Ohga ,  Sumio Hoshino ,  Ichiro Tsuchiya

    IPC分类号： C03B8/04 ,  C03B20/00 ,  C03B37/014 ,  G02B6/00 ,  C03B37/012

    CPC分类号： C03B37/01446

    摘要： In order to provide an improved process for the production of a glass preform for an optical fiber which includes substantially no bubble formation therein and also has a substantially uniform shape, the present invention provides a process for the production of a glass preform which is at least partially formed from silica. In particular, a body is formed on a rod by depositing fine glass particles thereon, preferably by the vapor phase reactions, and heating the body to vitrify under a reduced atmosphere or a vacuumed atmosphere so that the glass preform is produced. According to this process, the heating includes a first heating step of degassing the body at a first heating temperature, a second heating step of shrinking the body at a second heating temperature which is higher than the first heating temperature and which is lower than a third heating temperature, and a third heating step of vitrifying the shrunken body at the third temperature which corresponds to a vitrification temperature of the fine glass particles so as to produce the glass preform.

    摘要翻译： 为了提供用于生产用于光纤的玻璃预制棒的改进方法，其包括基本上不形成气泡并且还具有基本上均匀的形状，本发明提供了一种用于生产玻璃预制件的方法，所述玻璃预制件至少是 部分由二氧化硅形成。 特别地，通过优选通过气相反应在其上沉积微细玻璃颗粒而在棒上形成主体，并且在还原气氛或真空气氛下将体加热至玻璃化，从而制备玻璃预制件。 根据该方法，加热包括在第一加热温度下使本体脱气的第一加热步骤，在比第一加热温度高于第三加热温度的第二加热温度下使本体收缩的第二加热步骤， 加热温度，第三加热步骤，在与玻璃微细玻璃微粒的玻璃化温度对应的第三温度下使收缩体玻璃化，制成玻璃预制件。

    Process for producing optical fiber preform
    6.
    发明授权
    Process for producing optical fiber preform 有权
    生产光纤预制棒的工艺

    公开(公告)号：US06324871B1

    公开(公告)日：2001-12-04

    申请号：US09709321

    申请日：2000-11-13

    申请人： Motonori Nakamura ,  Yuichi Ohga ,  Toshio Danzuka

    发明人： Motonori Nakamura ,  Yuichi Ohga ,  Toshio Danzuka

    IPC分类号： C03B2000

    CPC分类号： C03B37/0142 ,  C03B2207/36 ,  C03B2207/52 ,  C03B2207/62 ,  C03B2207/70 ,  Y02P40/57

    摘要： In a process for producing an optical fiber preform, a starting member and a glass synthesizing burner are reciprocated relative to each other so that fine glass particles synthesized with the burner are deposited layer by layer on the starting member, and a heating power of the glass synthesizing burner in a nonsteady outside diameter portion at either end of the soot preform is adjusted to control the temperature of the nonsteady outside diameter portion at either end against local elevation. The starting member is formed of a transparent glass rod that is held within a vessel and rotatable about its own axis, the burner is fitted on a lateral side of the vessel at right angles to the rotating axis of the starting member and is movable towards or away from the starting member.

    摘要翻译： 在制造光纤预制件的过程中，起始构件和玻璃合成燃烧器相对于彼此往复运动，使得在燃烧器上合成的细微玻璃颗粒逐层沉积在起始构件上，并且玻璃的加热功率 在烟灰预制件的任一端的不稳定的外径部分中合成燃烧器被调节以控制任一端的不稳定的外径部分的温度抵抗局部升高。 起始构件由保持在容器内并可围绕其自身的轴线旋转的透明玻璃棒形成，燃烧器以与起始构件的旋转轴线成直角的方式装配在容器的横向侧上，并且可朝着或 远离起始成员。

    Method for flame abrasion of glass preform
    8.
    发明授权
    Method for flame abrasion of glass preform 失效
    玻璃预制件的火焰磨损方法

    公开(公告)号：US5685889A

    公开(公告)日：1997-11-11

    申请号：US227996

    申请日：1994-04-15

    申请人： Yuichi Ohga ,  Toshio Danzuka

    发明人： Yuichi Ohga ,  Toshio Danzuka

    IPC分类号： C03B29/04 ,  C03B29/02 ,  C03B37/012 ,  C03B37/014

    CPC分类号： C03B37/01446 ,  C03B29/02 ,  C03B37/01237 ,  C03B37/01257

    摘要： An optical fiber glass preform is preheated so that it is uniformly preheated therethrough, then a surface of the preform is abraded by an oxyhydrogen flame to obtain a smooth optical fiber glass preform. This method is advantageous when relatively larger diameter preforms are treated in this manner because the step of uniformly preheating the preform reduces or eliminates a temperature differential therein. The temperature differential could otherwise cause the preform to crack during cooling.

    摘要翻译： 将光纤玻璃预制件预热，使其均匀地预热，然后通过氢氧焰研磨预成型体的表面，得到光滑的光纤玻璃预制件。 当以这种方式处理相对较大直径的预成型件时，该方法是有利的，因为预成型件均匀地预热的步骤减少或消除其中的温差。 否则温度差异会导致预制件在冷却过程中破裂。

    Method for producing porous glass preform for optical fiber
    9.
    发明授权
    Method for producing porous glass preform for optical fiber 失效
    光纤多孔玻璃预制棒的制造方法

    公开(公告)号：US5238479A

    公开(公告)日：1993-08-24

    申请号：US984734

    申请日：1992-12-04

    申请人： Yuichi Ohga ,  Toshio Danzuka ,  Hiroo Kanamori ,  Hiroshi Yokota

    发明人： Yuichi Ohga ,  Toshio Danzuka ,  Hiroo Kanamori ,  Hiroshi Yokota

    IPC分类号： C03B37/014

    CPC分类号： C03B37/0142 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/26 ,  C03B2207/06 ,  C03B2207/20 ,  C03B2207/24 ,  C03B2207/26 ,  C03B2207/28 ,  C03B2207/50

    摘要： The invention is a method for producing a porous preform for use in the fabrication of an optical fiber at least two burners synthesize glass soot particles, one of which generates a double-layer flame and one of which is used for forming a core part of the preform. The method comprises the steps of supplying SiCl.sub.4 and optionally GeCl.sub.4 to the inner flame of the double-layer flame, and only SiCl.sub.4 to an outer flame of the double-layer flame to flame hydrolyze the supplied compounds and synthesize glass soot particles. Compounds SiCl.sub.4 and GeCl.sub.4 as glass-forming raw materials are supplied to the burner for forming the core part of the preform by depositing the generated glass soot particles on the lower end of a rotating starting member. The generated porous preform comprises a core part containing at least partly GeO.sub.2, and a surface having a low concentration of GeO.sub.2 which reduces cracking or peeling.

    摘要翻译： 本发明是用于制造用于制造光纤的多孔预制棒的方法，至少两个燃烧器合成玻璃烟灰颗粒，其中一个产生双层火焰，其中一个用于形成 预制件。 该方法包括以下步骤：向双层火焰的内部火焰提供SiCl 4和任选的GeCl 4，并且仅将SiCl 4与双层火焰的外部火焰直接火焰水解所提供的化合物并合成玻璃烟灰颗粒。 作为玻璃形成原料的化合物SiCl4和GeCl4通过将生成的玻璃烟灰颗粒沉积在旋转起始构件的下端而供给到用于形成预成型体的芯部的燃烧器。 生成的多孔预制件包括至少部分含有GeO 2的核心部分和具有低浓度GeO 2的表面，其减少开裂或剥离。