发明名称 |
Photo-taking lens having a filter |
摘要 |
A photo-taking lens comprises a lens component which allows to exit therefrom a bundle of rays forming the image of an object, a diaphragm which is disposed on the object side of the lens component and has a variable aperture, and an optical filter which is disposed adjacently to the diaphragm and is formed in a curved shape.
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申请公布号 |
US5225936(A) |
申请公布日期 |
1993.07.06 |
申请号 |
US19900460551 |
申请日期 |
1990.01.03 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
SUGIURA, MUNEHARU;YANAGAWA, SATOSHI |
分类号 |
G02B5/20;G02B15/16;G02B27/00;G03B11/00 |
主分类号 |
G02B5/20 |
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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