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公开(公告)号：US20180074289A1
公开(公告)日：2018-03-15
申请号：US15808278
申请日：2017-11-09
Applicant: OLYMPUS CORPORATION
Inventor： Keisuke ICHIKAWA , Shinichi MIHARA
IPC: G02B9/64
CPC classification number: G02B9/64 , G02B5/005 , G02B7/021 , G02B7/04 , G02B9/00 , G02B13/00 , G02B13/0045 , G02B13/006 , G02B13/02 , G02B13/18 , G02B21/36
Abstract: A single-focus optical system includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power. The first lens unit includes at least a first sub-unit, a second sub-unit, and a third sub-unit. The first sub-unit includes one of, a one negative lens component and a plurality of negative lens components that are continuous, the second sub-unit includes two meniscus lens components having respective concave surfaces thereof facing mutually, and the third sub-unit includes a plurality of positive lens components disposed closest to the reduction side in the third sub unit. The second lens unit includes one negative lens component. The third lens unit includes negative lens, and also includes a positive lens component closest to the enlargement side. All air spaces in the first lens unit are constant.
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公开(公告)号：US20170168281A1
公开(公告)日：2017-06-15
申请号：US15377529
申请日：2016-12-13
Applicant: OLYMPUS CORPORATION
Inventor： Yo FURUYA , Keisuke ICHIKAWA
CPC classification number: G02B21/02
Abstract: A microscope objective includes three groups that are in a positive-negative-positive configuration. The first lens group includes a plurality of cemented lenses, and includes, closest to the object, a meniscus lens having its concave surface on the object side. The second lens group includes a first meniscus lens component having its concave surface on the image side and a second meniscus lens component having its concave surface on the object side. At least one of the lens components of the third lens group is a cemented lens.
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公开(公告)号：US20170108674A1
公开(公告)日：2017-04-20
申请号：US15391928
申请日：2016-12-28
Applicant: OLYMPUS CORPORATION
Inventor： Keisuke ICHIKAWA
CPC classification number: G02B13/18 , G02B5/005 , G02B9/64 , G02B13/002 , G02B13/0045 , G02B13/006 , G02B13/04 , G02B13/06 , G02B13/16 , G02B15/177 , G02B27/0025 , H04N5/2254 , H04N5/23293
Abstract: An imaging optical system includes an aperture stop, a first cemented lens, a second cemented lens, and a third cemented lens, and the first cemented lens is positioned closer to the enlargement side than the aperture stop is, the second cemented lens is positioned on the reduction side and adjacent to a predetermined lens unit is, and the third cemented lens is positioned closer to the reduction side than the aperture stop is, the predetermined lens unit has a negative refractive power and includes all of lenses located from a lens positioned closest to the enlargement side to the first cemented lens, the first cemented lens includes a positive lens and a negative lens, the second cemented lens includes a negative lens and a positive lens, and the third cemented lens includes a positive lens and a negative lens.
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公开(公告)号：US20210255440A1
公开(公告)日：2021-08-19
申请号：US17189353
申请日：2021-03-02
Applicant: OLYMPUS CORPORATION
Inventor： Keisuke ICHIKAWA , Takashi FUJIKURA , Shinichi MIHARA , Yoshihiro UCHIDA
Abstract: A wide-angle optical system is a wide-angle optical system having a lens component, and includes in order from an object side, a first lens unit having a negative refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power. At the time of carrying out a focal-position adjustment from a far point to a near point, the second lens unit is moved from a first position toward a second position. The third lens unit includes not less than three lens components. Not less than three lens components include a first lens component and a second lens component. Each of the first lens component and the second lens component has a positive refractive power, and following conditional expression (1) is satisfied: 0.8
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公开(公告)号：US20210239950A1
公开(公告)日：2021-08-05
申请号：US17184784
申请日：2021-02-25
Applicant: OLYMPUS CORPORATION
Inventor： Keisuke ICHIKAWA , Takashi FUJIKURA , Shinichi MIHARA
Abstract: A wide-angle optical system includes in order from an object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third unit having a positive refractive power. At the time of carrying out a focal-position adjustment from a far point to a near point, the second lens unit is moved from a first position toward a second position. The third lens unit includes not less than three lens components, and not less than three lens components include a first lens component and a second lens component. The first lens component is a single lens and the second lens component is a cemented lens. Following conditional expression (1) is satisfied: −0.60
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Patent Agency Ranking
公开(公告)号：US20210181488A1
公开(公告)日：2021-06-17
申请号：US17190453
申请日：2021-03-03
Applicant: OLYMPUS CORPORATION
Inventor： Takashi FUJIKURA , Keisuke ICHIKAWA , Shinichi MIHARA
Abstract: A wide-angle optical system is a wide-angle optical system having a lens component. The lens component has a plurality of optical surfaces, in the lens component, two optical surfaces are in contact with air, and at least one optical surface is a curved surface. The wide-angle optical system includes in order from an object side, a first lens unit having a negative refractive power, a second lens unit, and a third lens unit having a positive refractive power. The second lens unit, for a focal-position adjustment, is moved between a first position and a second position along an optical axis. The third lens unit includes a cemented lens having a positive refractive power and a cemented lens having a negative refractive power, and following conditional expression (1) is satisfied: 0.05
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公开(公告)号：US20170108675A1
公开(公告)日：2017-04-20
申请号：US15391941
申请日：2016-12-28
Applicant: OLYMPUS CORPORATION
Inventor： Keisuke ICHIKAWA
CPC classification number: G02B13/18 , G02B9/64 , G02B13/06 , G02B27/005 , H04N5/2254 , H04N5/23293
Abstract: An imaging optical system includes, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power, the first lens unit includes a first negative lens and a first cemented lens, the second lens unit G2 includes a second cemented lens, one or more positive lens components, and a third cemented lens, and the first cemented lens includes a negative lens and has a surface having a concave surface facing toward the reduction side, the second cemented lens has a positive refractive power and has a surface having a concave surface facing toward the enlargement side, and the third cemented lens has a positive refractive power and includes a negative lens on the reduction side.
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公开(公告)号：US20180314043A1
公开(公告)日：2018-11-01
申请号：US16026997
申请日：2018-07-03
Applicant: OLYMPUS CORPORATION
Inventor： Keisuke ICHIKAWA , Shinichi MIHARA
IPC: G02B15/173 , G02B13/02 , G02B13/18 , G02B9/14
Abstract: A single-focus optical system includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power. The first lens unit includes either a first sub unit, a second sub unit, and a third sub unit, or one positive lens component in addition to the first sub unit, the second sub unit, and the third sub unit. The first sub-unit includes one negative lens component or a plurality of negative lens components, the second sub-unit includes two meniscus lens components, and the third sub-unit includes a plurality of positive lens components. The third lens unit includes a front side sub-unit and a rear side sub-unit. The front side sub-unit includes only a positive lens component.
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公开(公告)号：US20180067282A1
公开(公告)日：2018-03-08
申请号：US15800383
申请日：2017-11-01
Applicant: OLYMPUS CORPORATION
Inventor： Keisuke ICHIKAWA , Shinichi MIHARA
CPC classification number: G02B13/006 , G02B5/005 , G02B7/021 , G02B7/04 , G02B9/64 , G02B13/0045 , G02B13/04 , G02B13/16 , G02B21/36 , G03B21/147 , H04N5/2253 , H04N5/23293
Abstract: A single-focus optical system includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power. The first lens unit includes at least a first sub-unit, a second sub-unit, and a third sub-unit. The first sub-unit includes a negative lens component, the second sub-unit includes two meniscus lens components, and the third sub-unit includes a plurality of positive lens components. The third lens unit includes a front side sub-unit and a rear side sub-unit, and the front side sub-unit includes only a positive lens component. At the time of focusing, the first lens unit is fixed, the second lens unit is movable, and the rear side sub-unit is fixed.
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公开(公告)号：US20180067281A1
公开(公告)日：2018-03-08
申请号：US15800367
申请日：2017-11-01
Applicant: OLYMPUS CORPORATION
Inventor： Keisuke ICHIKAWA , Shinichi MIHARA
CPC classification number: G02B13/006 , G02B7/04 , G02B9/64 , G02B13/0045 , G02B13/04 , G02B13/16 , G02B13/18 , G03B21/147 , H04N5/2253 , H04N5/23293
Abstract: A single-focus optical system includes in order from an enlargement side, a first lens unit, and a second lens unit having a positive refractive power. A lens component is one of a single lens and a cemented lens. The first lens unit includes a reduction-side negative lens component closest to the reduction side, and in addition, the first lens unit includes not less than three negative lens components including the reduction-side negative lens component. The second lens unit includes in order from the enlargement side, a front side sub-unit and a rear side sub-unit. The front side sub-unit includes only a positive lens component, and the rear side sub-unit includes at least a negative lens.
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