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    Variable magnification optical system, optical apparatus, and method for producing variable magnification optical system
    2.
    发明授权
    Variable magnification optical system, optical apparatus, and method for producing variable magnification optical system 有权

    公开(公告)号：US11933951B2

    公开(公告)日：2024-03-19

    申请号：US17393379

    申请日：2021-08-03

    申请人： Nikon Corporation

    发明人： Takeshi Umeda

    IPC分类号： G02B15/14 ,  G02B13/18

    CPC分类号： G02B15/144113 ,  G02B15/145113 ,  G02B15/1461 ,  G02B13/18

    摘要： A variable magnification optical system comprising, in order from an object side, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, and a rear lens group having positive refractive power; upon varying a magnification, a distance between the first lens group and the second lens group being varied, a distance between the second lens group and the third lens group being varied, and a distance between the third lens group and the rear lens group being varied; the rear lens group comprising a focusing lens group which is moved upon carrying out focusing from an infinitely distant object to a closely distant object; and predetermined conditional expression(s) being satisfied, thereby various aberrations being corrected superbly.

    ZOOMING OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOMING OPTICAL SYSTEM
    3.
    发明公开
    ZOOMING OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOMING OPTICAL SYSTEM 审中-公开

    公开(公告)号：US20230418035A1

    公开(公告)日：2023-12-28

    申请号：US18242425

    申请日：2023-09-05

    申请人： Nikon Corporation

    发明人： Masashi YAMASHITA

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

    CPC分类号： G02B15/144113 ,  G02B27/646 ,  G02B15/145129 ,  G02B13/009 ,  G02B15/14 ,  G02B15/16 ,  Y10T29/4984

    摘要： 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.

    Zoom lens and image pickup apparatus
    8.
    发明授权
    Zoom lens and image pickup apparatus 有权

    公开(公告)号：US11768348B2

    公开(公告)日：2023-09-26

    申请号：US17584150

    申请日：2022-01-25

    申请人： CANON KABUSHIKI KAISHA

    发明人： Masaru Sakamoto ,  Tomoya Yamada

    IPC分类号： G02B7/10 ,  G02B15/14 ,  G02B15/17 ,  G02B15/173

    CPC分类号： G02B7/10 ,  G02B15/1461 ,  G02B15/144109 ,  G02B15/144113 ,  G02B15/145117 ,  G02B15/145125 ,  G02B15/145129 ,  G02B15/17 ,  G02B15/173

    摘要： A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a plurality of lens units which move in zooming, and a final lens unit having a positive refractive power, an interval between each pair of adjacent lens units changing in zooming, the plurality of lens units including a lens unit having a negative refractive power, the first lens unit including a negative lens and a positive lens, at least a part of the first lens unit moving for focusing, the first lens unit including a negative lens made of a material satisfying inequalities defined by a refractive index, an Abbe number, and a partial dispersion ratio, and the zoom lens satifying an inequality defined by a maximum value of an Abbe number of at least one positive lens of the first lens unit.

    Optical system, imaging module and electronic device
    10.
    发明授权
    Optical system, imaging module and electronic device 有权

    公开(公告)号：US12092801B2

    公开(公告)日：2024-09-17

    申请号：US17611148

    申请日：2020-03-16

    申请人： JIANGXI JINGCHAO OPTICAL CO., LTD.

    发明人： Hairong Zou

    IPC分类号： G02B15/14 ,  G02B13/00 ,  G02B7/02 ,  G03B5/02

    CPC分类号： G02B15/144113 ,  G02B13/009 ,  G02B7/021 ,  G03B5/02 ,  G03B2205/0046 ,  G03B2205/0069

    摘要： An optical system (10) includes, successively from an object side to an image side, a first lens unit (110) having a positive refractive power, a second lens unit (120) having a negative refractive power, a third lens unit (130) and a fourth lens unit (140) having a positive refractive power; the positions of the first lens unit (110) and the fourth lens unit (140) are fixed with respect to the imaging surface (S17) of the optical system (10), and the second lens unit (120) and the third lens unit (130) are movable with respect to the first lens unit (110) in the optical axis direction of the optical system (10); when the optical system is zoomed from the short focal end to the long focal end, a distance between the first lens unit (110) and the second lens unit (120) and the distance between the third lens unit (130) and the fourth lens unit (140) increase.