发明名称 |
Optical system, and image pick-up apparatus using the same |
摘要 |
An optical system including a diffractive optical element, and an optical member for suppressing incidence of ultraviolet radiation on the diffractive optical element is disclosed. The optical member is disposed on a light incident side of the diffractive optical element. The optical member has optical power to achieve an optical system that has high optical performance and preferable environmental durability.
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申请公布号 |
US7206126(B2) |
申请公布日期 |
2007.04.17 |
申请号 |
US20050039785 |
申请日期 |
2005.01.24 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
ENDO HIROSHI |
分类号 |
G02B5/22;G02B9/20;F21V9/06;G02B5/18;G02B13/00;G02B13/18;G02B15/14;G02B15/16;G02B15/163;G02B15/173;G02B15/20;G02B27/00;G03B11/00 |
主分类号 |
G02B5/22 |
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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