OPTICAL FIBER DRAWING METHODS AND DRAWING FURNACES
    2.
    发明申请
    OPTICAL FIBER DRAWING METHODS AND DRAWING FURNACES 有权
    光纤绘图方法和绘图法

    公开(公告)号:US20090241604A1

    公开(公告)日:2009-10-01

    申请号:US12408854

    申请日:2009-03-23

    IPC分类号: C03B37/025 C03B37/02

    摘要: Drawing methods and drawing furnaces for drawing an optical fiber with small non-circularity by simple drawing system are provided. An optical fiber preform is received into a muffle tube and heated by a primary heater placed to surround the muffle tube. The optical fiber preform is heated such that a starting position of a meniscus portion is higher in its position than the top of the primary heater, wherein the meniscus portion is created at the bottom portion of the optical fiber preform.

    摘要翻译: 提供了绘制方法和绘图炉,用于通过简单的绘图系统绘制具有小非圆形度的光纤。 光纤预制件被接纳到马弗管中,并通过放置在围绕马弗管的主加热器加热。 加热光纤预制件,使得弯月面部分的起始位置在其比初级加热器的顶部更高的位置,其中弯月面部分在光纤预制件的底部产生。

    OPTICAL FIBER DRAWING METHODS AND DRAWING FURNACES
    4.
    发明申请
    OPTICAL FIBER DRAWING METHODS AND DRAWING FURNACES 审中-公开
    光纤绘图方法和绘图法

    公开(公告)号:US20120192594A1

    公开(公告)日:2012-08-02

    申请号:US13411121

    申请日:2012-03-02

    IPC分类号: C03B37/029

    摘要: Drawing methods and drawing furnaces for drawing an optical fiber with small non-circularity by simple drawing system are provided. An optical fiber preform is received into a muffle tube and heated by a primary heater placed to surround the muffle tube. The optical fiber preform is heated such that a starting position of a meniscus portion is higher in its position than the top of the primary heater, wherein the meniscus portion is created at the bottom portion of the optical fiber preform.

    摘要翻译: 提供了绘制方法和绘图炉,用于通过简单的绘图系统绘制具有小非圆形度的光纤。 光纤预制件被接纳到马弗管中,并通过放置在围绕马弗管的主加热器加热。 加热光纤预制件,使得弯月面部分的起始位置在其比初级加热器的顶部更高的位置,其中弯月面部分在光纤预制件的底部产生。

    GLASS SUBSTRATE FOR MAGNETIC DISK AND MAGNETIC DISK APPARATUS
    5.
    发明申请
    GLASS SUBSTRATE FOR MAGNETIC DISK AND MAGNETIC DISK APPARATUS 有权
    用于磁盘和磁盘设备的玻璃基板

    公开(公告)号:US20090142626A1

    公开(公告)日:2009-06-04

    申请号:US12275576

    申请日:2008-11-21

    IPC分类号: G11B5/62

    CPC分类号: G11B5/7315 C03C19/00 G11B5/82

    摘要: A glass substrate for a magnetic disk satisfies Ra1≦0.8 [nm], 0 [nm]≦Ra1−Ra2≦0.2 [nm], Wa1≦0.6 [nm], and 0 [nm]≦Wa2−Wa1≦0.2 [nm]. Ra1 is an average surface roughness of a first annular area between 1 mm and 3 mm outward from an inner periphery of a main surface of the glass substrate, Ra2 is an average surface roughness of a second annular area between 1 mm and 3 mm inward from an outer periphery of the main surface, Wa1 is an average waviness of the first area in a circumferential direction of the glass substrate having a cycle of 300 μm to 5 mm, and Wa2 is an average waviness of the second area in the circumferential direction having a cycle of 300 μm to 5 mm.

    摘要翻译: 用于磁盘的玻璃基板满足Ra1 <= 0.8 [nm],0 [nm] <= Ra1-Ra2 <= 0.2 [nm],Wa1 <= 0.6 [nm],0 [nm] <= Wa2-Wa1 <= 0.2 [nm]。 Ra1是从玻璃基板的主表面的内周向外侧的1mm〜3mm之间的第一环状区域的平均表面粗糙度,Ra2是从1mm到3mm之间的第二环状区域的平均表面粗糙度 主表面的外周面Wa1是玻璃基板的周向的第一区域的平均波纹度为300μm〜5mm的周期,Wa2是周向的第二区域的平均波纹度,具有 300毫米至5毫米的循环。