Imaging optical system, and imaging apparatus inco

专利名称：Imaging optical system, and imaging

apparatus incorporating the same

发明人：Masaru Morooka申请号：US139486申请日：20130723公开号：US082484B2公开日：20150317

专利附图：

摘要：An imaging optical system including, from the object side to the image side, afirst lens group having positive refracting power, an aperture stop, and a second lensgroup having positive power, in which the first lens group consists of three lens

subgroups, having positive, negative and positive refracting powers, respectively, fromthe object side to the image side, with satisfaction of the following: 4<()/<15  (1)0.3<12/<4  (2) where fB is an on-axis distance, from an image side-surface in thesecond lens group to an image plane upon focusing at infinity, LTL is an on-axis distancefrom an object side-surface in the first lens group to the image side-surface in the secondlens group, D12 is an on-axis length from an image side-surface in the first lens group toan object side-surface in the second lens group upon focusing at infinity, and IH is amaximum image height.

申请人：Olympus Imaging Corp.

地址：Tokyo JP

国籍：JP

代理机构：Kenyon & Kenyon LLP

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