Method for producing glass preform for optical fiber
    34.
    发明授权
    Method for producing glass preform for optical fiber 失效
    光纤玻璃预制棒的制造方法

    公开(公告)号:US5364428A

    公开(公告)日:1994-11-15

    申请号:US203750

    申请日:1994-03-01

    IPC分类号: C03B37/014 C03B37/023

    摘要: A glass preform which is used for fabricating an optical fiber, has substantially no bubbles therein and contains sufficient amount of fluorine is produced by a method comprising steps of: forming a porous glass soot body from a glass-forming raw material, removing trapped gas and water from pores of the soot body by heating the soot body under pressure lower than several ten Torr. at a temperature at which the soot body is not vitrified, filling the pores of the soot body with a gas containing SiF.sub.4 and uniformly adding fluorine to the soot body, vitrifying the fluorine-added soot body into a transparent glass body, boring said transparent glass body to form a bore therein, and inserting a highly pure quartz rod in said bore to form a glass preform, or a method forming a glass soot composite body having a core portion consisting of a solid glass and a peripheral portion consisting of a porous glass mass, removing trapped gas and water from pores of the soot composite body by heating the soot composite body under a pressure lower than several ten Torr. at a temperature at which the porous glass mass is not vitrified, filling the pores in the porous glass mass of the soot composite body with a gas containing SiF.sub.4 and uniformly adding fluorine to the soot glass mass, and vitrifying the fluorine-added soot glass mass into a transparent glass mass to form a glass preform.

    摘要翻译: 用于制造光纤的玻璃预成型体在其中基本上没有气泡并且通过包括以下步骤的方法制造含有足够量的氟:从玻璃形成原料形成多孔玻璃烟炱体,除去被捕获的气体和 通过在低于几十乇的压力下加热烟灰体,从烟灰体的孔中吸收水分。 在烟灰体未被玻璃化的温度下,用含有SiF 4的气体填充烟灰体的孔,并将氟均匀地添加到烟炱体中,将氟化烟炱体玻璃化成透明玻璃体,使透明玻璃镗孔 在其中形成孔,并且将高纯石英棒插入所述孔中以形成玻璃预制件,或者形成玻璃烟灰复合体的方法,所述玻璃烟灰复合体具有由实心玻璃构成的芯部和由多孔玻璃构成的周边部 通过在低于几十乇的压力下加热烟灰复合体,从烟灰复合体的孔中除去捕获的气体和水。 在多孔玻璃体未被玻璃化的温度下,用含有SiF 4的气体填充烟灰复合体的多孔玻璃块中的孔,并向烟灰玻璃块均匀地加入氟,并且将添加氟的烟灰玻璃块 变成透明玻璃块以形成玻璃预制件。

    Total reflection X-ray fluorescence apparatus
    35.
    发明授权
    Total reflection X-ray fluorescence apparatus 失效
    全反射X射线荧光装置

    公开(公告)号:US5220591A

    公开(公告)日:1993-06-15

    申请号:US813931

    申请日:1991-12-27

    IPC分类号: G01N23/22

    CPC分类号: G01N23/2206

    摘要: A total reflection X-ray fluorescence apparatus comprises a base material having an optically flat surface for totally reflecting X-rays radiated at a small glancing angle, a first detector such as an SSD for detecting fluorescent X-rays emerging from a specimen located near the optically flat surface of the base material and a second detector such as a scintillation counter for detecting intensity of X-rays coming from the base material.

    摘要翻译: 全反射X射线荧光装置包括具有光学平面的基材,用于全反射以小的扫视角度辐射的X射线;第一检测器,例如用于检测从位于附近的样品出射的荧光X射线 基材的光学平坦表面和用于检测来自基材的X射线强度的闪烁计数器的第二检测器。

    Total reflection X-ray fluorescence apparatus
    37.
    发明授权
    Total reflection X-ray fluorescence apparatus 失效
    总反射X射线荧光装置

    公开(公告)号:US5249216A

    公开(公告)日:1993-09-28

    申请号:US597027

    申请日:1990-10-15

    IPC分类号: G01N23/22 G01N23/203

    CPC分类号: G01N23/2206

    摘要: A total reflection X-ray fluorescence apparatus comprises a base material having an optically flat surface for totally reflecting X-rays radiated at a small glancing angle, a first detector such as an SSD for detecting fluorescent X-rays emerging from a specimen located near the optically flat surface of the base material and a second detector such as a scintillation counter for detecting an intensity of an X-rays coming from the base material.

    摘要翻译: 全反射X射线荧光装置包括具有光学平面的基材,用于全反射以小的扫视角度辐射的X射线;第一检测器,例如用于检测从位于附近的样品出射的荧光X射线 基材的光学平坦表面和用于检测来自基材的X射线强度的闪烁计数器的第二检测器。