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    OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING THE OPTICAL SYSTEM
    11.
    发明公开
    OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING THE OPTICAL SYSTEM 审中-公开

    公开(公告)号：US20230258914A1

    公开(公告)日：2023-08-17

    申请号：US18009669

    申请日：2021-04-12

    Applicant: Nikon Corporation

    Inventor： Masashi YAMASHITA ,  Akino KONDO

    IPC: G02B15/14 ,  G02B15/20

    CPC classification number: G02B15/1441 ,  G02B15/20

    Abstract: This optical system (OL) has a first lens group (G1) having positive refractory power, a second lens group (G2), a third lens group (G3), and a fourth lens group (G4) which are aligned in order from an object side along an optical axis, wherein when focused from an infinity object to a short-distance object, the second lens group (G2) and the third lens group (G3) move in mutually different trajectories along the optical axis, and the second lens group (G2) and the third lens group (G3) are composed of three or less lenses in total.

    ZOOMING OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOMING OPTICAL SYSTEM
    18.
    发明申请
    ZOOMING OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOMING OPTICAL SYSTEM 有权

    公开(公告)号：US20210382284A1

    公开(公告)日：2021-12-09

    申请号：US17409784

    申请日：2021-08-23

    Applicant: Nikon Corporation

    Inventor： Masashi YAMASHITA

    IPC: G02B15/14 ,  G02B27/64 ,  G02B13/00 ,  G02B15/16

    Abstract: A compact zooming optical system, an optical apparatus and a method for manufacturing the zooming optical system having a vibration reduction function, a high zooming ratio, a wide-angle view and superb optical performance are provided, the system including, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having negative refractive power; upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group G1 and the second lens group G2, a distance between the second lens group G2 and the third lens group G3 and a distance between the third lens group G3 and the fourth lens group G4 being respectively varied; the third lens group G3 having, in order from the object side, a first segment group G31 having positive refractive power and a second segment group G32; the second segment group G32 being moved to have a component in a direction perpendicular to the optical axis; and predetermined conditional expressions being satisfied.

    VARIABLE MAGNIFICATION OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR PRODUCING VARIABLE MAGNIFICATION OPTICAL SYSTEM
    20.
    发明申请
    VARIABLE MAGNIFICATION OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR PRODUCING VARIABLE MAGNIFICATION OPTICAL SYSTEM 审中-公开

    公开(公告)号：US20180259755A1

    公开(公告)日：2018-09-13

    申请号：US15981523

    申请日：2018-05-16

    Applicant: NIKON CORPORATION

    Inventor： Akihiko OBAMA ,  Masashi YAMASHITA

    IPC: G02B15/20 ,  G02B15/173 ,  G02B27/64

    Abstract: A variable magnification optical system has, in order from an object side: a first lens group having positive refractive power; a second lens group having negative refractive power; an aperture stop; a third lens group having positive refractive power; and a rear lens group. Upon zooming from a wide-angle end state to a telephoto end state, at least the rear lens group is moved toward the object side, and distances between the lens groups are varied. Upon focusing from an infinitely distant object to a closely distant object, the third lens group is moved along the optical axis. At least a portion of the rear lens group constitutes a vibration reduction lens group having negative refractive power and moveable perpendicular to the optical axis. An optical apparatus and a method of manufacture are also provided.

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