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公开(公告)号:EP2437093A1
公开(公告)日:2012-04-04
申请号:EP11178254.6
申请日:2011-08-22
申请人: Sony Corporation
发明人: Takei, Shoji
CPC分类号: G02B13/004 , G02B9/16 , G02B13/22
摘要: An imaging lens includes an aperture stop, a first lens having positive refractive power, a second lens having negative refractive power, a third lens having positive refractive power, and a fourth lens having negative refractive power. Both surfaces of the first lens, both surfaces of the second lens, both surfaces of the third lens, and both surfaces of the fourth lens are formed as aspheric surfaces. The following condition expression (1), condition expression (2), and condition expression (3) are satisfied. - 1.09 ≤ f 2 / f ≤ - 0.81 - 1.62 ≤ f 2 / f 1 ≤ - 1.42 0.65 ≤ f 3 / f ≤ 0.97
in which
f1: the focal length of the first lens
f2: the focal length of the second lens
f3: the focal length of the third lens
f: the focal length of the lens whole system摘要翻译: 成像透镜包括孔径光阑,具有正屈光力的第一透镜,具有负屈光力的第二透镜,具有正屈光力的第三透镜和具有负屈光力的第四透镜。 第一透镜的两个表面,第二透镜的两个表面,第三透镜的两个表面和第四透镜的两个表面都形成为非球面。 满足以下条件表达式(1),条件表达式(2)和条件表达式(3)。 - 1.09‰¤¢¢2 / f‰ - 0.81 - 1.62‰¤f ¢2 / f ¢1‰¤ - 1.42 0.65‰¤f ¢3 / f‰¤0.97其中f1:焦距 第一透镜f2的焦距:第二透镜的焦距f3:第三透镜的焦距f:透镜整体系统的焦距
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公开(公告)号:EP2437093B1
公开(公告)日:2013-04-17
申请号:EP11178254.6
申请日:2011-08-22
申请人: Sony Corporation
发明人: Takei, Shoji
CPC分类号: G02B13/004 , G02B9/16 , G02B13/22
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