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    Zoom lens and image pickup apparatus having the same
    1.
    发明授权
    Zoom lens and image pickup apparatus having the same 有权
    具有相同的变焦镜头和摄像装置

    公开(公告)号：US09588323B2

    公开(公告)日：2017-03-07

    申请号：US14645942

    申请日：2015-03-12

    申请人： CANON KABUSHIKI KAISHA

    发明人： Yuki Tatenuma ,  Masakazu Kodaira ,  Takahiro Yoshimi

    IPC分类号： G02B15/17 ,  G02B15/173 ,  G02B15/177 ,  G02B15/28 ,  G02B15/26 ,  G02B15/24

    CPC分类号： G02B15/17 ,  G02B15/173 ,  G02B15/177 ,  G02B15/24 ,  G02B15/26 ,  G02B15/28

    摘要： The zoom lens according to the present invention includes in order from an object side to an image side: a first lens unit; a second lens unit; a third lens unit; an aperture stop; and a fourth lens unit; wherein a partial dispersion ratio θLm of a material of a positive lens Lm formed of a material having a highest partial dispersion ratio, which is contained in a rear group, a distance d from the aperture stop to an image plane, a distance dLm from the aperture stop to a positive lens Lm, an average value νRfp of Abbe constants of materials of positive lenses contained in a front group, an average value θRfp of partial dispersion ratios thereof, an average value νRfn of Abbe constants of materials of negative lenses contained in the front group, and an average value θRfn of partial dispersion ratios thereof are each appropriately set.

    摘要翻译： 根据本发明的变焦透镜从物体侧到图像侧依次包括：第一透镜单元; 第二透镜单元; 第三透镜单元; 孔径光阑; 和第四透镜单元; 其中由包含在后组中的具有最高分散比的材料形成的正透镜Lm的材料的部分色散比θLm，从孔径光阑到像面的距离d，距离d 孔径光阑到正透镜Lm，前组中包含的正透镜的材料的阿贝常数的平均值νRfp，其部分色散比的平均值θRfp，负透镜的材料的阿贝常数的平均值νRfn包含在 正面组和其部分色散比的平均值θRfn分别适当地设定。

    OPTICAL SYSTEM AND IMAGING APPARATUS INCLUDING THE SAME
    3.
    发明申请
    OPTICAL SYSTEM AND IMAGING APPARATUS INCLUDING THE SAME 有权
    光学系统和成像装置，包括它们

    公开(公告)号：US20160313543A1

    公开(公告)日：2016-10-27

    申请号：US15132989

    申请日：2016-04-19

    申请人： CANON KABUSHIKI KAISHA

    发明人： Makoto Nakahara

    IPC分类号： G02B15/22

    CPC分类号： G02B15/22 ,  G02B9/10 ,  G02B13/04 ,  G02B13/18 ,  G02B13/24 ,  G02B15/00 ,  G02B15/08 ,  G02B15/161 ,  G02B15/24 ,  G02B15/26

    摘要： An optical system includes, in order from an object side toward an image side, a first lens unit having positive refractive power, and a second lens unit having negative refractive power. A distance between consecutive ones of the lens units changes when focusing is performed. The first lens unit is stationary during focusing. The second lens unit is moved toward the image side when focus is changed from an object at infinity to an object at a short distance. Lateral magnification β2 of the second lens unit when focusing on the object at infinity, focal length f1 of the first lens unit, and focal length f2 of the second lens unit are set appropriately to satisfy predetermined mathematical conditions.

    摘要翻译： 光学系统从物体侧朝向像侧依次包括具有正屈光力的第一透镜单元和具有负屈光力的第二透镜单元。 当进行聚焦时，连续的透镜单元之间的距离改变。 第一个镜头单元在聚焦期间是静止的。 当焦点从无限远的物体变为距离较短的物体时，第二透镜单元朝向像侧移动。 当聚焦在无限远物体上时第二透镜单元的横向放大率β2，第一透镜单元的焦距f1和第二透镜单元的焦距f2被适当地设置以满足预定的数学条件。

    Zoom lens and imaging apparatus
    4.
    发明授权
    Zoom lens and imaging apparatus 有权
    变焦镜头和成像设备

    公开(公告)号：US08824062B2

    公开(公告)日：2014-09-02

    申请号：US13903316

    申请日：2013-05-28

    申请人： FUJIFILM Corporation

    发明人： Toshihiro Aoi ,  Shinkichi Ikeda

    IPC分类号： G02B15/14 ,  G02B13/18 ,  G02B3/02 ,  G02B15/17 ,  G02B15/26

    CPC分类号： G02B15/14 ,  G02B15/17 ,  G02B15/26

    摘要： A zoom lens consists of positive first lens group, which is fixed during changing magnification, negative second lens group, which is moved during changing magnification, negative third lens group for correcting a fluctuation of an image plane caused by changing magnification, and positive fourth lens group, which is fixed during changing magnification, which are in this order from an object side. The first lens group consists of negative lens and positive lens group consisting of three or less positive lenses in this order from the object side. Each of the negative lens and at least one of the positive lens or lenses in the first lens group has at least an aspherical surface. A predetermined formula is satisfied.

    摘要翻译： 变焦透镜由变倍倍率下固定的正第一透镜组，变倍放大期间移动的负第二透镜组，用于校正由变化倍率引起的像平面波动的负第三透镜组，以及正第四透镜 组，其在变化放大期间被固定，其从物体侧开始依次排列。 第一透镜组由从物体侧起依次由三个或更少的正透镜组成的负透镜和正透镜组组成。 第一透镜组中的负透镜和正透镜中的至少一个具有至少一个非球面。 满足规定的公式。

    ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME
    5.
    发明申请
    ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME 有权
    变焦镜头和图像拾取器具

    公开(公告)号：US20150268456A1

    公开(公告)日：2015-09-24

    申请号：US14645942

    申请日：2015-03-12

    申请人： CANON KABUSHIKI KAISHA

    发明人： Yuki Tatenuma ,  Masakazu Kodaira ,  Takahiro Yoshimi

    IPC分类号： G02B15/17 ,  G02B15/173 ,  G02B15/177

    CPC分类号： G02B15/17 ,  G02B15/173 ,  G02B15/177 ,  G02B15/24 ,  G02B15/26 ,  G02B15/28

    摘要： The zoom lens according to the present invention includes in order from an object side to an image side: a first lens unit; a second lens unit; a third lens unit; an aperture stop; and a fourth lens unit; wherein a partial dispersion ratio θLm of a material of a positive lens Lm formed of a material having a highest partial dispersion ratio, which is contained in a rear group, a distance d from the aperture stop to an image plane, a distance dLm from the aperture stop to a positive lens Lm, an average value νRfp of Abbe constants of materials of positive lenses contained in a front group, an average value θRfp of partial dispersion ratios thereof, an average value νRfn of Abbe constants of materials of negative lenses contained in the front group, and an average value θRfn of partial dispersion ratios thereof are each appropriately set.

    摘要翻译： 根据本发明的变焦透镜从物体侧到图像侧依次包括：第一透镜单元; 第二透镜单元; 第三透镜单元; 孔径光阑; 和第四透镜单元; 其中包含在后组中的具有最高部分色散比的材料形成的正透镜Lm的材料的部分色散比Lm，从孔径光阑到像面的距离d，距离dLm 从孔径光阑到正透镜Lm，前组中包含的正透镜材料的阿贝常数的平均值＆ngr; Rf值，平均值和其部分分散比的Rfp，阿贝的平均值＆ngr; Rfn 包含在前组中的负透镜的材料的常数以及其部分分散比的平均值＆amp; Rfn分别适当地设定。

    ZOOM LENS UNIT, IMAGING DEVICE, AND MONITORING VIDEO CAMERA
    6.
    发明申请
    ZOOM LENS UNIT, IMAGING DEVICE, AND MONITORING VIDEO CAMERA 有权
    变焦镜头单元，成像设备和监视摄像机

    公开(公告)号：US20150260968A1

    公开(公告)日：2015-09-17

    申请号：US14637932

    申请日：2015-03-04

    申请人： Kazuyasu OHASHI

    发明人： Kazuyasu OHASHI

    IPC分类号： G02B15/163 ,  H04N7/18 ,  H04N5/232 ,  G02B7/02

    CPC分类号： G02B15/17 ,  G02B7/008 ,  G02B7/028 ,  G02B13/009 ,  G02B15/163 ,  G02B15/24 ,  G02B15/26 ,  H04N5/2254 ,  H04N5/23296 ,  H04N7/18

    摘要： A zoom lens unit includes, in order from an object side to an image side, a first lens group having positive refractive power and a focus function, a second lens group having negative refractive power, which moves when changing a magnification, a third lens group which moves when changing a magnification, and a fourth lens group having positive refractive power, which is fixed when changing a magnification, wherein the following condition (1) is fulfilled: |M2W·M3W·M4W|

    摘要翻译： 变焦透镜单元从物体侧到像侧依次包括具有正折光力和聚焦功能的第一透镜组，具有负折射力的第二透镜组，其在改变倍率时移动;第三透镜组 （1）满足：M2W·M3W·M4W | <0.14（1）其中，M2W表示在变更放大率时移动的第1透镜组和具有正折射力的第4透镜组， 广角端的第二透镜组的成像倍率，M3W表示广角端的第三透镜组的成像倍率，M4W表示第四透镜组在广角端的成像倍率。

    ZOOM LENS AND IMAGING APPARATUS
    10.
    发明申请
    ZOOM LENS AND IMAGING APPARATUS 有权
    变焦镜头和成像装置

    公开(公告)号：US20130258497A1

    公开(公告)日：2013-10-03

    申请号：US13903316

    申请日：2013-05-28

    申请人： FUJIFILM Corporation

    发明人： Toshihiro AOI ,  Shinkichi IKEDA

    IPC分类号： G02B15/14

    CPC分类号： G02B15/14 ,  G02B15/17 ,  G02B15/26

    摘要： A zoom lens consists of positive first lens group, which is fixed during changing magnification, negative second lens group, which is moved during changing magnification, negative third lens group for correcting a fluctuation of an image plane caused by changing magnification, and positive fourth lens group, which is fixed during changing magnification, which are in this order from an object side. The first lens group consists of negative lens and positive lens group consisting of three or less positive lenses in this order from the object side. Each of the negative lens and at least one of the positive lens or lenses in the first lens group has at least an aspherical surface. A predetermined formula is satisfied.

    摘要翻译： 变焦透镜由变倍倍率下固定的正第一透镜组，变倍放大期间移动的负第二透镜组，用于校正由变化倍率引起的像平面波动的负第三透镜组，以及正第四透镜 组，其在变化放大期间被固定，其从物体侧开始依次排列。 第一透镜组由从物体侧起依次由三个或更少的正透镜组成的负透镜和正透镜组组成。 第一透镜组中的负透镜和正透镜中的至少一个具有至少一个非球面。 满足规定的公式。