发明名称 |
METHOD FOR MANUFACTURING BASE MATERIAL |
摘要 |
A preform manufacturing method of the present invention has a hole forming step of forming a plurality of holes in a glass body to produce a glass pipe, and a heating integration step of heating the glass pipe with core rods including core portions being inserted in the respective holes, thereby to implement integration of the core rods and the glass pipe. In the hole forming step, a peripheral hole out of the holes to be formed in the glass body is formed at a position determined in consideration of positional variation of the core portion before and after the integration. |
申请公布号 |
EP2960218(A4) |
申请公布日期 |
2016.11.02 |
申请号 |
EP20140753822 |
申请日期 |
2014.02.20 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
NAKANISHI TETSUYA;TARU TOSHIKI |
分类号 |
C03B37/012 |
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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