发明名称 |
Method of detecting when an optical preform MCVD tube is completely closed |
摘要 |
A method of detecting a critical state of closing of a preform during a phase of closing of the preform following a phase of deposition of layers of material that reduce the radial size of an opening formed in the preform smaller in the radial direction comprises the steps of injecting a gas into the opening, measuring a pressure in a pipe element through which the injected gas flows and detecting the critical state of closing of the optical preform on the basis of a measured pressure.
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申请公布号 |
US6484538(B1) |
申请公布日期 |
2002.11.26 |
申请号 |
US19960682088 |
申请日期 |
1996.07.17 |
申请人 |
ALCATEL |
发明人 |
REGNIER JEAN-FRANCOIS;ORCEL GERARD |
分类号 |
C03B37/018;(IPC1-7):C03B37/07 |
主分类号 |
C03B37/018 |
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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