发明名称 |
Method for drawing glass parent material and drawing machine for use therein |
摘要 |
To provide a elongating method for elongating an optical fiber parent material with high reliability by implementing a high precision control for the outer diameter in short time. This elongating method includes a process for switching a control method for at least one of the control items of measurement object, based on at least one of a difference between measured value and target value and a change rate of the difference per unit time, in measuring the outer diameter of a glass parent material elongating portion and making a feedback control for the elongating conditions based on the difference from the target outer diameter.
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申请公布号 |
US7886561(B2) |
申请公布日期 |
2011.02.15 |
申请号 |
US20040516115 |
申请日期 |
2004.11.30 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
KAWASAKI KIICHIRO;HOSHINO SUMIO |
分类号 |
C03B37/012;C03B23/047 |
主分类号 |
C03B37/012 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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