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    ZOOM OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING THE ZOOM OPTICAL SYSTEM
    12.
    发明申请
    ZOOM OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING THE ZOOM OPTICAL SYSTEM 有权

    公开(公告)号：US20230059659A1

    公开(公告)日：2023-02-23

    申请号：US17793950

    申请日：2020-11-11

    Applicant: Nikon Corporation

    Inventor： Hiroshi YAMAMOTO

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

    Abstract: A zoom optical system consists of, in order from an object on an optical axis: a first lens group having a positive refractive power; a second lens group having a negative refractive power; and a rear group that includes a plurality of lens groups. The rear group comprises a first focusing lens group having a positive refractive power, and a second focusing lens group having a negative refractive power. Upon zooming from a wide angle end to a telephoto end, distances between lens groups adjacent to each other among the first lens group, the second lens group, and the plurality of lens groups, change. Upon focusing from an infinity object to a short distance object, the first focusing lens group and the second focusing lens group move toward an image along movement trajectories different from each other. The following conditional expression is satisfied, 1.10

    OPTICAL GLASS, OPTICAL ELEMENT, OPTICAL SYSTEM, AND OPTICAL DEVICE
    15.
    发明申请
    OPTICAL GLASS, OPTICAL ELEMENT, OPTICAL SYSTEM, AND OPTICAL DEVICE 有权
    光学玻璃，光学元件，光学系统和光学器件

    公开(公告)号：US20150065330A1

    公开(公告)日：2015-03-05

    申请号：US14520583

    申请日：2014-10-22

    Applicant: NIKON CORPORATION

    Inventor： Tetsuya KOIDE ,  Hiroshi YAMAMOTO

    IPC: C03C3/066 ,  C03C3/064 ,  G02B1/00

    CPC classification number: C03C3/066 ,  C03C3/064 ,  G02B1/00 ,  G02B27/0062

    Abstract: An optical glass includes, in weight percent: 15% to 36% of SiO2; 13% to 31% of B2O3; 4% to 27% of Al2O3; 0% to 19% of Ta2O5; 0% to 10% of ZrO2; and 0% to 10% of Nb2O5; wherein Ta2O5+Nb2O5+ZrO2≧7.1%; and has optical constants including a refractive index nd between 1.54 and less than 1.61 and an Abbe number vd in the range of 50 to 57; and wherein ΔPgy that denotes the anomalous dispersion is −0.004 or less.

    Abstract translation: 光学玻璃包括重量百分比：15％至36％的SiO 2; 13％〜31％的B2O3; 4％〜27％的Al2O3; 0％〜19％的Ta2O5; 0％〜10％的ZrO2; 和0〜10％的Nb2O5; 其中Ta2O5 + Nb2O5 +ZrO2≥7.1％; 并且具有包括折射率nd在1.54和小于1.61之间的光学常数，并且阿贝数vd在50至57的范围内; 并且其中表示异常色散的＆Dgr; Pgy为-0.004或更小。

    ZOOM OPTICAL SYSTEM, IMAGING DEVICE AND METHOD FOR MANUFACTURING THE ZOOM OPTICAL SYSTEM
    16.
    发明申请
    ZOOM OPTICAL SYSTEM, IMAGING DEVICE AND METHOD FOR MANUFACTURING THE ZOOM OPTICAL SYSTEM 有权

    公开(公告)号：US20250076622A1

    公开(公告)日：2025-03-06

    申请号：US18952952

    申请日：2024-11-19

    Applicant: NIKON CORPORATION

    Inventor： Tomoki ITO ,  Hiroshi YAMAMOTO

    IPC: G02B15/14 ,  G02B5/00 ,  G02B27/00 ,  G02B27/64

    Abstract: A zoom optical system includes, in order from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, and a third lens group having positive refractive power. The first lens group moves toward an object and air distances between the first to the third lens groups are varied upon zooming from a wide-angle end state to a tele-photo end state. The first lens group comprises a cemented lens consisting of a negative lens and a positive lens in order from the object. The following conditional expressions are satisfied: 4.4

    ZOOM OPTICAL SYSTEM, IMAGING DEVICE AND METHOD FOR MANUFACTURING THE ZOOM OPTICAL SYSTEM
    20.
    发明申请
    ZOOM OPTICAL SYSTEM, IMAGING DEVICE AND METHOD FOR MANUFACTURING THE ZOOM OPTICAL SYSTEM 审中-公开
    变焦光学系统，成像装置和制造光学系统的方法

    公开(公告)号：US20170068076A1

    公开(公告)日：2017-03-09

    申请号：US15256738

    申请日：2016-09-06

    Applicant: Nikon Corporation

    Inventor： Tomoki ITO ,  Hiroshi YAMAMOTO

    IPC: G02B15/173 ,  G02B5/00 ,  G02B27/64 ,  G02B27/00

    Abstract: The art is formed of, disposed in order from an object, a first lens group (G1) having positive refractive power, a second lens group (G2) having negative refractive power, and a third lens group (G3) having positive refractive power, in which at least a part of the second lens group (G2) or at least a part of the third lens group (G3) is configured to be movable, as a vibration-proof lens group for correcting an image blur, so as to have a component in a direction perpendicular to an optical axis, and the following conditional expression is satisfied: 4.40

    Abstract translation: 其中f1表示第一透镜组（G1）的焦距，f2表示第二透镜组（G2）的焦距。

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