发明名称 |
Diffractive optical element and optical instrument having the same |
摘要 |
A diffractive optical element for diffracting non-collimated light includes a base surface and a periodic structure formed on the base surface and having a plurality of diffractive surfaces and a plurality of boundary surfaces. The boundary surfaces are separated into plural zones, and in each zone, the boundary surface is placed substantially parallel to a main portion of a light beam impinging on that zone.
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申请公布号 |
US6008942(A) |
申请公布日期 |
1999.12.28 |
申请号 |
US19970997704 |
申请日期 |
1997.12.23 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
OGUSU, MAKOTO;MAEHARA, HIROSHI;SAKAI, KEITA |
分类号 |
G02B5/18;(IPC1-7):G02B5/18;G02B27/44 |
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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