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    VARIABLE MAGNIFICATION OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR PRODUCING VARIABLE MAGNIFICATION OPTICAL SYSTEM
    2.
    发明公开
    VARIABLE MAGNIFICATION OPTICAL SYSTEM, OPTICAL DEVICE, AND METHOD FOR PRODUCING VARIABLE MAGNIFICATION OPTICAL SYSTEM 审中-公开

    公开(公告)号：US20240151952A1

    公开(公告)日：2024-05-09

    申请号：US18412740

    申请日：2024-01-15

    Applicant: Nikon Corporation

    Inventor： Akihiko OBAMA ,  Masashi YAMASHITA

    IPC: G02B15/14 ,  G02B15/20

    CPC classification number: G02B15/144113 ,  G02B15/20

    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.

    Imaging lens and imaging apparatus
    5.
    发明授权
    Imaging lens and imaging apparatus 有权

    公开(公告)号：US11841486B2

    公开(公告)日：2023-12-12

    申请号：US17155283

    申请日：2021-01-22

    Applicant: FUJIFILM Corporation

    Inventor： Daiki Kawamura ,  Michio Cho

    IPC: G02B15/14 ,  G02B27/00 ,  G02B15/20

    CPC classification number: G02B15/1421 ,  G02B15/20 ,  G02B27/0025

    Abstract: An imaging lens includes a positive first lens group and a second lens group, which are continuous in order from the position closest to the object side, as lens groups. During focusing, the distance between the first lens group and the second lens group changes. A stop is disposed closer to the image side than a lens which is second from the object side. A combined refractive power of all lenses closer to the object side than the stop is positive. The imaging lens includes an LA positive lens and an LB positive lens that satisfy a predetermined conditional expression at a position closer to the object side than the stop. An Abbe number of the LB positive lens is the maximum among Abbe numbers of all positive lenses closer to the object side than the stop.

    OPTICAL ZOOM DEVICE
    7.
    发明公开
    OPTICAL ZOOM DEVICE 审中-公开

    公开(公告)号：US20230358924A1

    公开(公告)日：2023-11-09

    申请号：US18305410

    申请日：2023-04-24

    Applicant: Nextlens Switzerland AG

    Inventor： Manuel ASCHWANDEN

    IPC: G02B3/14 ,  G02B15/14 ,  G02B7/10 ,  G02B15/20 ,  H04N23/55

    CPC classification number: G02B3/14 ,  G02B15/142 ,  G02B7/10 ,  G02B15/20 ,  H04N23/55 ,  G03B2205/0069 ,  G03B2205/0076

    Abstract: The invention relates to an optical zoom device (1) Optical zoom device (1), comprising a first lens assembly (2), and a second lens assembly (3) following the first lens assembly (2) in the direction of an optical axis (A) of the optical zoom device (1) so that light (L) can pass through the first lens assembly (2) and thereafter through the second lens assembly when travelling along the optical axis (A), wherein said lens assemblies each comprise a focus-adjustable lens (31, 32) as well as an electropermanent magnet (107, 207) or a shape memory alloy (120, 220) for actuating the respective lens (31, 32).

    Optical system and image capturing apparatus including the same
    10.
    发明授权
    Optical system and image capturing apparatus including the same 有权

    公开(公告)号：US11782252B2

    公开(公告)日：2023-10-10

    申请号：US17336934

    申请日：2021-06-02

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Takahiro Komiyama

    IPC: G02B15/14 ,  G02B7/10 ,  G02B15/20

    CPC classification number: G02B15/1461 ,  G02B7/10 ,  G02B15/20

    Abstract: An optical system includes a front lens unit, a first focusing unit having a negative refractive power, and a second focusing unit having a negative refractive power in this order from an object side to an image side. The optical system is a single focus optical system. When a focus is shifted from an object at infinity to an object at a short distance, the first focusing unit and the second focusing unit move to change a distance between the first focusing unit and the second focusing unit on an optical axis.

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