| 发明名称 |
Diffractive optical element and optical system having the same |
| 摘要 |
<p>Disclosed is a diffractive optical element which includes a substrate made of a fluoride compound, and a diffraction grating formed on the substrate by use of an oxide compound such as a fluoride compound or a metal oxide, for example. <IMAGE></p> |
| 申请公布号 |
EP0921418(A2) |
申请公布日期 |
1999.06.09 |
| 申请号 |
EP19980309879 |
申请日期 |
1998.12.02 |
| 申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
KATO, HIDEO;MAEHARA, HIROSHI;TAMAMORI, KENJI |
| 分类号 |
G02B5/18;G02B27/00;G03F7/20;(IPC1-7):G02B5/18 |
主分类号 |
G02B5/18 |
| 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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