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.
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
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