Imaging optical system, and imaging apparatus incorporating the same
US-8982484-B2 · Mar 17, 2015 · US
US9703080B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9703080-B2 |
| Application number | US-201514618287-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 10, 2015 |
| Priority date | Aug 30, 2012 |
| Publication date | Jul 11, 2017 |
| Grant date | Jul 11, 2017 |
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Systems and apparatuses provide for an imaging optical system that facilitates aberration reductions while ensuring brightness and a proper angle of view. Embodiments provide for (i) an imaging optical system that allows for a simple structure of a focusing mechanism and (ii) an imaging apparatus incorporating such an imaging optical system. The imaging optical system may include, from the object side to the image side, a first lens group having positive refracting power, an aperture stop, and a second lens group having positive power, in which the first lens group consists of three lens subgroups, having positive, negative and positive refracting powers, respectively, from the object side to the image side.
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What is claimed is: 1. An imaging optical system comprising, in order from an object side to an image side: a first lens group having positive refracting power, an aperture stop, and a second lens group having positive refracting power, wherein there is no lens group other than said first lens group and said second lens group, said first lens group consists of three lens subgroups, including in order from the object side to the image side, a first lens subgroup having posi…
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