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    Zoom lens and image pickup apparatus
    1.
    发明授权
    Zoom lens and image pickup apparatus 有权

    公开(公告)号：US11921268B2

    公开(公告)日：2024-03-05

    申请号：US17574108

    申请日：2022-01-12

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Akihiko Yuki ,  Kazuya Shimomura

    IPC: G02B15/177 ,  G02B13/00 ,  G02B13/02

    CPC classification number: G02B15/177 ,  G02B13/009 ,  G02B13/02

    Abstract: A zoom lens includes, in order from an object side to an image side, a lens unit closest to the object side and having a positive refractive power, an intermediate unit including at least three lens units and an aperture stop, and a lens unit closest to the image side and having a positive refractive power. A distance between each pair of adjacent lens units changes in zooming. The lens unit closest to the object side is configured not to move for zooming, and the at least three lens units and the aperture stop are configured to move in zooming. The lens unit closest to the image side includes a first positive lens. A predetermined condition is satisfied.

    ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME
    3.
    发明公开
    ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME 审中-公开

    公开(公告)号：US20240045186A1

    公开(公告)日：2024-02-08

    申请号：US18339262

    申请日：2023-06-22

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Takashi OKADA

    IPC: G02B15/177 ,  G02B15/14

    CPC classification number: G02B15/177 ,  G02B15/145523 ,  G02B15/144511

    Abstract: A zoom lens includes, in order from the object side to the image side, a first lens unit having negative refractive power, a second lens unit having positive refractive power. A distance between adjacent lens units changes during zooming from a wide-angle end to a telephoto end. During zooming from the wide-angle end to the telephoto end, the first lens unit moves to the image side and then to the object side. The first lens unit includes four lenses or more, the four lenses or more including, in order from the object side to the image side, a first negative meniscus lens with a convex surface facing the object side and a second negative meniscus lens with a convex surface facing the object side. A predetermined condition is satisfied.

    ZOOM LENS, OPTICAL APPARATUS, AND METHOD FOR MANUFACTURING ZOOM LENS
    5.
    发明公开
    ZOOM LENS, OPTICAL APPARATUS, AND METHOD FOR MANUFACTURING ZOOM LENS 审中-公开

    公开(公告)号：US20230258907A1

    公开(公告)日：2023-08-17

    申请号：US18139801

    申请日：2023-04-26

    Applicant: Nikon Corporation

    Inventor： Takeshi UMEDA

    IPC: G02B9/60 ,  G02B15/177 ,  G02B15/14 ,  G02B13/02 ,  G02B27/00

    CPC classification number: G02B9/60 ,  G02B15/177 ,  G02B15/145527 ,  G02B13/02 ,  G02B27/0025 ,  G02B27/646

    Abstract: A zoom lens includes, in order from an object along an optical axis: a first lens group having a negative refractive power; a second lens group having a positive refractive power; a third lens group having a negative refractive power; a fourth lens group; and a fifth lens group. When the zoom lens performs varying magnification, the distance between the first and second lens groups changes, the distance between the second and third lens groups changes, the distance between the third and fourth lens groups changes, the distance between the fourth and fifth lens groups changes, the second and fourth lens groups move along the same trajectory along the optical axis, and at least the third lens group moves along the optical axis.

    ZOOM LENS AND OPTICAL INSTRUMENT
    6.
    发明申请
    ZOOM LENS AND OPTICAL INSTRUMENT 审中-公开

    公开(公告)号：US20190018229A1

    公开(公告)日：2019-01-17

    申请号：US16064807

    申请日：2016-12-09

    Applicant: Sony Corporation

    Inventor： Naoki Miyagawa ,  Yonghua Chen

    IPC: G02B13/18 ,  G02B15/20 ,  G02B15/177 ,  G02B9/62

    CPC classification number: G02B13/18 ,  G02B9/62 ,  G02B13/009 ,  G02B15/173 ,  G02B15/177 ,  G02B15/20

    Abstract: A zoom lens according to the disclosure includes a first lens group having positive refractive power, a second lens group, a third lens group, a fourth lens group, a fifth lens group, and a sixth lens group. The first lens group includes a front side first lens group fixed with respect to an image plane upon zooming from a wide end to a telephoto end and focusing from an infinite object to a short-distance object, and a rear side first lens group having positive refractive power. The second, third, and fifth lens groups travel along an optical axis upon zooming. The fourth and sixth lens groups are fixed with respect to the image plane in an optical axis direction upon zooming. At least two lens groups including the rear side first lens group travel along the optical axis upon focusing.

    IMAGING OPTICAL SYSTEM
    7.
    发明申请
    IMAGING OPTICAL SYSTEM 审中-公开

    公开(公告)号：US20180364452A1

    公开(公告)日：2018-12-20

    申请号：US16108825

    申请日：2018-08-22

    Applicant: HOYA CORPORATION

    Inventor： Akitoshi USUI ,  Yutaka TAKAKUBO

    IPC: G02B13/00 ,  G02B15/177 ,  G02B13/18 ,  G02B9/60 ,  G02B9/64 ,  G02B9/62

    CPC classification number: G02B13/006 ,  G02B9/60 ,  G02B9/62 ,  G02B9/64 ,  G02B13/002 ,  G02B13/0045 ,  G02B13/18 ,  G02B15/177

    Abstract: An imaging optical system includes a positive or negative first lens group including a negative lens element closest to the object, a diaphragm, and a positive second lens group. The negative lens element closest to the object has an object-side aspherical surface including a paraxial convex surface, a paraxial curvature that is the greatest within the effective aperture, and a portion within the effective aperture having a curvature less than ½ of the paraxial curvature. These conditions are satisfied: R1/f 0.4 −2.5 56 “f” designates the overall focal length; f1, R1 and D1 respectively designate the focal length, paraxial radius of curvature of an object-side surface, and thickness, of the negative lens element closest to the object; and V designates the Abbe number regarding the d-line of a lens element, within the second lens group, closest to the diaphragm.

    Imaging optical system
    8.
    发明授权
    Imaging optical system 有权

    公开(公告)号：US10082648B2

    公开(公告)日：2018-09-25

    申请号：US15450456

    申请日：2017-03-06

    Applicant: HOYA CORPORATION

    Inventor： Akitoshi Usui ,  Yutaka Takakubo

    IPC: G02B13/18 ,  G02B13/00 ,  G02B9/60 ,  G02B9/62 ,  G02B9/64 ,  G02B15/177

    CPC classification number: G02B13/006 ,  G02B9/60 ,  G02B9/62 ,  G02B9/64 ,  G02B13/002 ,  G02B13/0045 ,  G02B13/18 ,  G02B15/177

    Abstract: An imaging optical system includes a positive or negative first lens group including a negative lens element closest to the object, a diaphragm, and a positive second lens group. The negative lens element closest to the object has an object-side aspherical surface including a paraxial convex surface, a paraxial curvature that is the greatest within the effective aperture, and a portion within the effective aperture having a curvature less than ½ of the paraxial curvature. These conditions are satisfied: R1/f 0.4 −2.5 56 “f” designates the overall focal length; f1, R1 and D1 respectively designate the focal length, paraxial radius of curvature of an object-side surface, and thickness, of the negative lens element closest to the object; and V designates the Abbe number regarding the d-line of a lens element, within the second lens group, closest to the diaphragm.

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