| 发明名称 |
Ring lighting for the dark ground observation of a precious stone. |
| 摘要 |
<p>Improved ring lighting for microscopes, characterized in that it comprises substantially the combination of a light source (5) remote from the precious stone being examined, a glass fiber guide (8) extending to an annular end-piece (9) and a reflector (7) secured on the latter.</p> |
| 申请公布号 |
EP0019309(A1) |
申请公布日期 |
1980.11.26 |
| 申请号 |
EP19800200298 |
申请日期 |
1980.03.31 |
| 申请人 |
CHANDESAIS, JEAN LOUIS JEANNE |
发明人 |
CHANDESAIS, JEAN LOUIS JEANNE |
| 分类号 |
G02B21/06;G01N21/87;G02B6/00;G02B6/04;G02B21/08;(IPC1-7):02B21/06;01N33/38;01N21/87;02B5/16 |
主分类号 |
G02B21/06 |
| 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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