发明名称 |
Glass blank for an optical element as well as method and apparatus for heat treating the blank |
摘要 |
An object of the present invention is to provide an improved blank such that an optical member of a high homogeneity can be obtained therefrom, and to provide a vessel and a heat treatment method for heat-treating a highly uniform synthetic quartz blank. In a first aspect of the invention a special designed blank is provided showing a concave shaped outer surface. In a second aspect of the invention a special designed vessel for heat-treating blanks is provided, whereby the degree of heat emission at the center is set higher than that of the surroundings. <IMAGE> |
申请公布号 |
EP1211226(A3) |
申请公布日期 |
2003.02.26 |
申请号 |
EP20010128615 |
申请日期 |
2001.11.30 |
申请人 |
HERAEUS QUARZGLAS GMBH & CO. KG;SHIN-ETSU QUARTZ PRODUCTS CO.,LTD. |
发明人 |
UEDA, TETSUJI;FUJINOKI, AKIRA;NISHIMURA, HIROYUKI;TROMMER, MARTIN;OCHS, STEFAN |
分类号 |
C03B19/14;C03B32/00;C03C23/00 |
主分类号 |
C03B19/14 |
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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