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    ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME
    12.
    发明申请
    ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME 有权
    使用相同的变焦镜头和图像拾取装置

    公开(公告)号：US20140376102A1

    公开(公告)日：2014-12-25

    申请号：US14478891

    申请日：2014-09-05

    Applicant: OLYMPUS CORPORATION

    Inventor： Keisuke ICHIKAWA

    IPC: G02B15/20

    CPC classification number: G02B15/163 ,  G02B13/009 ,  G02B15/173 ,  G02B15/20

    Abstract: A zoom lens includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, a fifth lens unit having a positive refractive power, and an aperture stop disposed between the second lens unit and the third lens unit. At the time of zooming, the aperture stop moves and the fifth lens unit is fixed. At the time of zooming from a wide angle end to a telephoto end, a distance between the first lens unit and the second lens unit widens, a distance between the second lens unit and the third lens unit narrows, a distance between the third lens unit and the fourth lens unit fluctuates, and a distance between the fourth lens unit and the fifth lens unit fluctuates.

    Abstract translation: 变焦透镜包括具有正折光力的第一透镜单元，具有负折光力的第二透镜单元，具有正折光力的第三透镜单元，具有负折光力的第四透镜单元，具有正折光力的第五透镜单元 设置在第二透镜单元和第三透镜单元之间的孔径光阑。 在变焦时，孔径光阑移动，第五透镜单元固定。 在从广角端到望远端的变焦时，第一透镜单元和第二透镜单元之间的距离变宽，第二透镜单元和第三透镜单元之间的距离变窄，第三透镜​​单元 并且第四透镜单元波动，并且第四透镜单元与第五透镜单元之间的距离变动。

    WIDE-ANGLE OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS USING THE SAME
    13.
    发明申请
    WIDE-ANGLE OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS USING THE SAME 有权

    公开(公告)号：US20210255439A1

    公开(公告)日：2021-08-19

    申请号：US17189679

    申请日：2021-03-02

    Applicant: OLYMPUS CORPORATION

    Inventor： Takashi FUJIKURA ,  Keisuke ICHIKAWA ,  Shinichi MIHARA

    IPC: G02B13/04 ,  G02B15/14

    Abstract: A wide-angle optical system includes a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a positive refractive power. At the time of carrying out a focal-position adjustment, the second lens unit is moved. The third lens unit includes a positive single lens on an image side of a cemented surface Sc having a negative refractive power nearest to an image in the third lens unit, and has a plurality of refractive surfaces having a negative refractive power on the object side of the cemented surface Sc. The third lens unit has at least one refractive surface Sp having a positive refractive power which satisfies following conditional expression (1): 0.02

    SINGLE-FOCUS OPTICAL SYSTEM AND OPTICAL APPARATUS USING THE SAME
    14.
    发明申请
    SINGLE-FOCUS OPTICAL SYSTEM AND OPTICAL APPARATUS USING THE SAME 审中-公开

    公开(公告)号：US20190033563A1

    公开(公告)日：2019-01-31

    申请号：US16147677

    申请日：2018-09-29

    Applicant: OLYMPUS CORPORATION

    Inventor： Keisuke ICHIKAWA ,  Shinichi MIHARA

    IPC: G02B13/18 ,  G02B13/00 ,  G02B9/34

    Abstract: A single-focus optical system includes a front lens unit and a rear lens unit. The front lens unit either includes a predetermined sub lens unit or includes an enlargement-side sub lens unit and a predetermined sub lens unit. The rear lens unit includes a first sub lens unit, a second sub lens unit, a third sub lens unit, and a fourth sub lens unit. The enlargement-side sub lens unit includes a negative lens component. The predetermined sub lens unit includes an enlargement-side meniscus lens component and a reduction-side meniscus lens component. The first sub lens unit includes positive lenses and a first predetermined negative lens. The second sub lens unit includes a predetermined negative lens component. The third sub lens unit includes a predetermined positive lens component. The fourth sub lens unit includes all lens components positioned on the reduction side of the predetermined positive lens component.

    SINGLE-FOCUS OPTICAL SYSTEM AND OPTICAL APPARATUS USING THE SAME
    15.
    发明申请
    SINGLE-FOCUS OPTICAL SYSTEM AND OPTICAL APPARATUS USING THE SAME 审中-公开

    公开(公告)号：US20180052300A1

    公开(公告)日：2018-02-22

    申请号：US15800320

    申请日：2017-11-01

    Applicant: OLYMPUS CORPORATION

    Inventor： Keisuke ICHIKAWA ,  Shinichi MIHARA

    IPC: G02B9/64 ,  G02B13/18

    CPC classification number: G02B9/64 ,  G02B5/005 ,  G02B7/021 ,  G02B7/04 ,  G02B13/0045 ,  G02B13/006 ,  G02B13/04 ,  G02B13/18 ,  G02B21/36

    Abstract: A single-focus optical system includes a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a positive refractive power. The first lens unit includes a reduction-side lens component closest to the reduction side, and a shape of the reduction-side lens component is a meniscus shape having a convex surface directed toward the enlargement side. The second lens unit includes a cemented lens of a meniscus shape having a convex surface directed toward the reduction side, and a plurality of positive lens components. The cemented lens in the second lens unit includes a negative lens and a positive lens. The third lens unit includes a negative lens component closest to the enlargement side. All air spaces in the first lens unit and in the second lens unit are constant at the time of focusing.

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