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    ZOOM LENS AND OPTICAL APPARATUS EQUIPPED WITH THIS ZOOM LENS
    4.
    发明公开
    ZOOM LENS AND OPTICAL APPARATUS EQUIPPED WITH THIS ZOOM LENS 审中-公开

    公开(公告)号：EP3428706A2

    公开(公告)日：2019-01-16

    申请号：EP18183667.7

    申请日：2009-02-25

    Applicant: Nikon Corporation

    Inventor： MITSUKI, Shinichi

    IPC: G02B15/177 ,  G02B27/00

    Abstract: A zoom lens of the present invention has a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power, which are disposed in order from an object, wherein the distances between each lens group are changed upon zooming, the second lens group has at least two positive lenses having an aspherical surface respectively, and when vd is an Abbe number at least one of the positive lenses having the aspherical surface satisfies a condition of the following expression: vd > 70.

    ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME
    6.
    发明公开
    ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME 有权
    包括相同的变焦镜头和图像拾取设备

    公开(公告)号：EP3101462A1

    公开(公告)日：2016-12-07

    申请号：EP16172808.4

    申请日：2016-06-03

    Applicant: Canon Kabushiki Kaisha

    Inventor： INOMOTO, Yu

    IPC: G02B13/16 ,  G02B15/177 ,  H04N5/232

    CPC classification number: G02B15/177 ,  G02B13/06 ,  G02B13/16 ,  G02B13/18 ,  H04N5/23238

    Abstract: A zoom lens includes: a first lens unit having a negative refractive power; and a rear group having a positive refractive power, in which, when a focal length of the zoom lens is a shortest focal length, a maximum image height is lower than a half of a diagonal length of an image pickup region, and when a focal length of the zoom lens at which the maximum image height becomes a half of the diagonal length of the image pickup region is defined as an intermediate focal length, a focal length of the zoom lens at a longest focal length, a half angle of field of the zoom lens at the longest focal length, and other such factors are appropriately set so that the maximum image height is increased continuously from the shortest focal length to the intermediate focal length.

    Abstract translation: 变焦镜头包括：具有负屈光力的第一透镜单元; 以及具有正屈光力的后组，其中，当变焦镜头的焦距为最短焦距时，最大像高低于图像摄取区域的对角线长度的一半，并且当焦点 在该最大图像高度变图像拾取区域的对角线长度的一半被定义为中间焦距，变焦透镜的在最长焦距的焦距，的半视场角的变焦透镜的长度 最长焦距处的变焦镜头等其他因素被适当地设置，使得最大像高从最短焦距连续增加到中间焦距。

    Zoom lens of the retrofocus type having two lens groups
    7.
    发明授权
    Zoom lens of the retrofocus type having two lens groups 有权
    复古变焦镜头的焦距有两个镜头组

    公开(公告)号：EP1959287B1

    公开(公告)日：2016-06-29

    申请号：EP08250543.9

    申请日：2008-02-15

    Applicant: Nikon Corporation

    Inventor： Muratani, Mami

    IPC: G02B15/177 ,  G02B13/18

    CPC classification number: G02B15/177 ,  G02B13/18

    Abstract: Zoom lens of the retrofocus type excellently correcting various aberrations and compact, lightweight. The zoom consists of, in order from the object, a first group (G1) having negative power, a second group (G2) having positive power. Upon zooming from wide-angle end (W) to telephoto end (T), the distance between the first group (G1) and the second group (G2) decreases. The first group (G1) consists of, in order from the object, a first lens (L1) having negative power and a second lens (L2) having positive power. The second group (G2) consists of, in order from the object, a third lens (L3) having positive power, a fourth lens (L4) having negative power, and a fifth lens (L5) having positive power. The thickness (S2) of the second lens group (G2) fulfils : 0,76

    Optical system and image projection apparatus including the same
    8.
    发明公开
    Optical system and image projection apparatus including the same 审中-公开
    Optisches System和Bildprojektionsvorrichtung damit

    公开(公告)号：EP2765446A1

    公开(公告)日：2014-08-13

    申请号：EP13199806.4

    申请日：2013-12-30

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Inoko, Kazuhiro

    IPC: G02B27/00 ,  G02B15/177

    Abstract: In an optical system including a front lens unit having negative refractive power, a stop, and a rear lens unit having positive refractive power in order from an enlargement side to a reduction side, the front lens unit has a combination lens in which a negative lens and a positive lens are adjacently arranged in order from the enlargement side to the reduction side, and a focal length of the negative lens f N , an Abbe number ν N and relative partial dispersion θ N of a material of the negative lens, an Abbe number ν P and relative partial dispersion θ P of a material of the positive lens, and a focal length of the entire optical system f W are appropriately set.

    Abstract translation: 在包括具有负屈光力的前透镜单元的光学系统，具有从放大侧到缩小侧的正屈光力的后透镜单元的前透镜单元具有组合透镜，其中负透镜 并且正透镜从放大侧到还原侧依次排列，负透镜的焦距f N，阿贝数1/2和负透镜的材料的相对部分色散¸N，阿贝 数量½P和正透镜的材料的相对部分色散¸P以及整个光学系统f W的焦距被适当地设定。

    Zoom lens of the retrofocus type having four lens groups
    9.
    发明公开
    Zoom lens of the retrofocus type having four lens groups 有权
    具有四个镜头组的反焦型变焦镜头

    公开(公告)号：EP2749926A2

    公开(公告)日：2014-07-02

    申请号：EP13198261.3

    申请日：2013-12-19

    Applicant: Ricoh Imaging Company, Ltd.

    Inventor： Saori, Masakazu

    IPC: G02B15/177 ,  G02B27/64

    CPC classification number: G02B15/177 ,  G02B15/14 ,  G02B27/646

    Abstract: Zoom lens of the retrofocus-type comprising a negative first lensgroup (Gl), a positive second lens-group (G2), a negative third lensgroup (G3) and a positive fourth lens group (G4), in that order from the object side, wherein upon zooming from the short focal-length to the long focal-length, the distance between said first lens-group (Gl) and said second lens-group (G2) decreases, the distance between said second lens-group (G2) and said third lens-group (G3) increases and the distance between said third lens-group (G3) and said fourth lens-group (G4) decreases, wherein said third lens-group (G3) includes a cemented doublet consisting of a positive lens (31) and a negative lens (32) and wherein the following inequalities are fulfilled: (1) -2.50

    Abstract translation: 从物体侧依次包括负焦距型第一透镜组（G1），正型第二透镜组（G2），负型第三透镜组（G3）和正型第四透镜组（G4）的反焦型变焦透镜 其中在从所述短焦距变焦到所述长焦距时，所述第一透镜组（G1）与所述第二透镜组（G2）之间的距离减小，所述第二透镜组（G2）与所述第二透镜组 并且所述第三透镜组（G3）增加并且所述第三透镜组（G3）与所述第四透镜组（G4）之间的距离减小，其中所述第三透镜组（G3）包括由正 透镜（31）和负透镜（32），并且其中满足以下不等式：（1）-2.50

    Zoom lens and electronic device including the same
    10.
    发明公开
    Zoom lens and electronic device including the same 审中-公开
    缩写Objektiv und elektronische Vorrichtung，死于Selben

    公开(公告)号：EP2741117A1

    公开(公告)日：2014-06-11

    申请号：EP13192590.1

    申请日：2013-11-12

    Applicant: Samsung Electronics Co., Ltd

    Inventor： Hagiwara, Hiroyuki

    IPC: G02B15/177 ,  G02B27/64

    Abstract: A zoom lens includes, sequentially from an object side, a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having negative refractive power; and a fourth lens group having positive refractive power. When zoom is varied from a wide-angle end to a telephoto end, positions of the first lens group and the fourth lens group are fixed on an optical axis. The second lens group includes, sequentially from the object side, a second A lens group having positive refractive power and a second B lens group having positive refractive power, and the second B lens group is moved in the optical axis direction to perform a focusing function from an object disposed in a close range to an object disposed at infinity. The third lens group is shifted in a direction perpendicular to the optical axis to correct image blur.

    Abstract translation: 变焦透镜从物体侧依次包括具有负折光力的第一透镜组，具有正折光力的第二透镜组，具有负折光力的第三透镜组; 以及具有正屈光力的第四透镜组。 当从广角端到望远端变焦时，第一透镜组和第四透镜组的位置固定在光轴上。 第二透镜组从物体侧依次包括具有正折光力的第二A透镜组和具有正折光力的第二B透镜组，并且第二B透镜组沿光轴方向移动以执行聚焦功能 从设置在近距离处的物体设置在无限远处的物体。 第三透镜组在垂直于光轴的方向上移动以校正图像模糊。

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