发明名称 Image capture lens and image capture apparatus
摘要 An image capture lens includes: when changed from infinity to close focusing, a first lens group moving from an image to an object with positive refractive power; and a second lens group fixed relatively to the image with negative refractive power, wherein the first lens group includes a negative first lens having a strong concave surface facing the image, the second lens group includes one negative lens having a strong concave surface facing the image or a negative cemented lens including positive and negative lenses, and conditional expressions; 0.7<f1/fi<0.9, 1.0<bf/fi<1.4, 0.5<Rf2/Rr2<1 are satisfied where fi: overall focal length, f1: first-lens-group focal length, bf: overall back focus, Rf2: radius of curvature of the image-side surface of the lens nearest to the object, and Rr2: radius of curvature of the surface nearest to the image of the second lens group.
申请公布号 US2009225445(A1) 申请公布日期 2009.09.10
申请号 US20090379823 申请日期 2009.03.03
申请人 SONY CORPORATION 发明人 SUEYOSHI MASAFUMI
分类号 G02B9/04 主分类号 G02B9/04
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