发明名称 |
Measurement method of non-circularity of core optical fiber base material and apparatus therefor |
摘要 |
A method for measuring non-circularity of a core part of an optical fiber base material having the core part and a clad part includes immersing the optical fiber base material in liquid having a refractive index substantially equal to that of the clad part of the optical fiber base material; irradiating parallel light from a side face of the optical fiber base material to measure intensity distribution of transmitted light; measuring a width of a dark space caused by light passing the core part on intensity distribution to obtain a relative value for a core diameter; rotating the optical fiber base material to further obtain the relative value for the core diameter at plural points for a circumferential direction; and obtaining non-circularity of the core part based on the obtained plurality of relative values for the core diameter.
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申请公布号 |
US7633608(B2) |
申请公布日期 |
2009.12.15 |
申请号 |
US20050593875 |
申请日期 |
2005.03.18 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
OTOSAKA TETSUYA |
分类号 |
G01B11/30;G01N21/00;G01B11/08;G01B11/24;G01M11/00;G01M11/02;G01M11/08;G01N21/86;G01V8/00 |
主分类号 |
G01B11/30 |
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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