公开(公告)号：US20090073573A1

公开(公告)日：2009-03-19

申请号：US12215934

申请日：2008-06-30

申请人： Fumikazu Kanetaka

发明人： Fumikazu Kanetaka

IPC分类号： G02B15/177

CPC分类号： G02B15/177

摘要： A zoom optical system comprising, in order from an object side: a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a positive refractive power, a space between the lens units being changed to thereby perform zooming and focusing, wherein the first lens unit is constituted of a negative lens.

摘要翻译： 一种变焦光学系统，包括从物体侧开始的顺序：具有负折光力的第一透镜单元; 具有正屈光力的第二透镜单元; 以及具有正折光力的第三透镜单元，改变透镜单元之间的空间，从而进行变焦和聚焦，其中第一透镜单元由负透镜构成。

公开(公告)号：US20120206819A1

公开(公告)日：2012-08-16

申请号：US13371494

申请日：2012-02-13

申请人： Fumikazu Kanetaka ,  Atsuo Kikuchi

发明人： Fumikazu Kanetaka ,  Atsuo Kikuchi

IPC分类号： G02B15/14

CPC分类号： G02B15/173 ,  G02B27/646

摘要： A zoom lens includes a first lens group having a positive refracting power, a second lens group having a negative refracting power, a third lens group having a positive refracting power, and a fourth lens group having a positive refracting power. When the zoom lens is zoomed from a wide-angle end state to a telephoto end state, the first lens group is moved toward the object side so that a distance between the first and second lens groups increases and the third lens group is moved toward the object side so that a distance between the second and third lens groups decreases. The second lens group includes three lenses: negative, positive, and negative lenses in order from the object side to the image side. The third lens group includes three lenses: positive, negative, and positive lenses in order from the object side to the image side.

摘要翻译： 变焦透镜包括具有正折射率的第一透镜组，具有负折射力的第二透镜组，具有正折射率的第三透镜组和具有正折射光焦度的第四透镜组。 当变焦镜头从广角端状态变焦到望远端状态时，第一透镜组朝向物体侧移动，使得第一和第二透镜组之间的距离增加，并且第三透镜组朝向 使得第二和第三透镜组之间的距离减小。 第二透镜组包括从物体侧到图像侧的三个透镜：负像素，正透镜和负透镜。 第三透镜组包括从物体侧到图像侧的三个透镜：正，负和正透镜。

公开(公告)号：US20110194015A1

公开(公告)日：2011-08-11

申请号：US12929468

申请日：2011-01-27

申请人： Fumikazu Kanetaka

发明人： Fumikazu Kanetaka

IPC分类号： G02B15/14 ,  H04N5/232

CPC分类号： G02B15/173

摘要： A zoom lens includes: a first lens group including a reflection member that deflects an optical path by 90 degrees and having positive refracting power; a second lens group having negative refracting power; a third lens group having positive refracting power; at least one lens group having negative refracting power and at least one lens group having positive refracting power disposed as a fourth lens group and the following lens groups, the first to third lens groups and the fourth and following lens groups arranged in this order from an object side toward an image side; and an aperture diaphragm disposed in the vicinity of the third lens group, wherein in zooming from a wide angle end state to a telescopic end state, the first lens group is fixed, the second lens group is moved toward the image side, and the fourth lens group is moved toward the object side, and the zoom lens satisfies the following conditional equation 1

摘要翻译： 变焦透镜包括：第一透镜组，包括使光路偏转90度并具有正折射力的反射构件; 具有负折射力的第二透镜组; 具有正折射力的第三透镜组; 具有负折射力的至少一个透镜组和具有正折射率的至少一个透镜组作为第四透镜组设置，并且具有以下透镜组，第一至第三透镜组和第四透镜组以及后续透镜组从该 物体侧朝向图像侧; 以及设置在所述第三透镜组附近的孔径光阑，其中，从广角端状态到伸缩端状态的变焦中，所述第一透镜组被固定，所述第二透镜组朝向所述像侧移动， 透镜组朝向物体侧移动，变焦透镜满足以下条件式1 <（R1B + R21A）/（R1B-R21A）<20。

公开(公告)号：US08693107B2

公开(公告)日：2014-04-08

申请号：US13371494

申请日：2012-02-13

申请人： Fumikazu Kanetaka ,  Atsuo Kikuchi

发明人： Fumikazu Kanetaka ,  Atsuo Kikuchi

IPC分类号： G02B15/14 ,  G02B15/173

CPC分类号： G02B15/173 ,  G02B27/646

摘要： A zoom lens includes a first lens group having a positive refracting power, a second lens group having a negative refracting power, a third lens group having a positive refracting power, and a fourth lens group having a positive refracting power. When the zoom lens is zoomed from a wide-angle end state to a telephoto end state, the first lens group is moved toward the object side so that a distance between the first and second lens groups increases and the third lens group is moved toward the object side so that a distance between the second and third lens groups decreases. The second lens group includes three lenses: negative, positive, and negative lenses in order from the object side to the image side. The third lens group includes three lenses: positive, negative, and positive lenses in order from the object side to the image side.

摘要翻译： 变焦透镜包括具有正折射率的第一透镜组，具有负折射率的第二透镜组，具有正折射率的第三透镜组和具有正折射率的第四透镜组。 当变焦镜头从广角端状态变焦到望远端状态时，第一透镜组朝向物体侧移动，使得第一和第二透镜组之间的距离增加，并且第三透镜组朝向 使得第二和第三透镜组之间的距离减小。 第二透镜组包括从物体侧到图像侧的三个透镜：负像素，正透镜和负透镜。 第三透镜组包括从物体侧到图像侧的三个透镜：正，负和正透镜。

公开(公告)号：US07576927B2

公开(公告)日：2009-08-18

申请号：US12001262

申请日：2007-12-07

申请人： Fumikazu Kanetaka ,  Toshio Takahashi ,  Tomoyuki Satori

发明人： Fumikazu Kanetaka ,  Toshio Takahashi ,  Tomoyuki Satori

IPC分类号： G02B9/34

CPC分类号： G02B15/173

摘要： The invention relates to a less costly zoom lens that can offer a sensible tradeoff between size reductions and high zoom ratios with a well-kept image quality, and that lends itself to an electronic imaging device such as a CCD or CMOS. The zoom lens comprises a positive first lens group G1, a negative second lens group G2, a positive third lens group G3 and a positive fourth lens group G4, wherein zooming is implemented by changing the space between adjacent lens groups. The first lens group G1 comprises one positive lens, the second lens group G2 comprises two lenses, and the fourth lens group G4 comprises one positive lens. The zoom lens satisfies condition (1) needed for making sure an ideal situation for the zoom ratio and low costs and condition (2) needed for the first lens group to comprise a minimum one lens and to hold back chromatic aberration of magnification as much as possible.

摘要翻译： 本发明涉及一种成本较低的变焦镜头，其能够以良好保持的图像质量提供尺寸减小和高变焦比之间的明显权衡，并且其适用于诸如CCD或CMOS的电子成像装置。 变焦透镜包括正的第一透镜组G1，负的第二透镜组G2，正的第三透镜组G3和正的第四透镜组G4，其中通过改变相邻透镜组之间的空间来实现变焦。 第一透镜组G1包括一个正透镜，第二透镜组G2包括两个透镜，第四透镜组G4包括一个正透镜。 变焦透镜满足为确保变焦倍率的理想情况和第一透镜组所需的低成本和条件（2）所需的条件（1），并且保持倍率的色像差尽可能多 可能。

公开(公告)号：US20090067061A1

公开(公告)日：2009-03-12

申请号：US12215204

申请日：2008-06-24

申请人： Kenji Ono ,  Keisuke Ichikawa ,  Fumikazu Kanetaka

发明人： Kenji Ono ,  Keisuke Ichikawa ,  Fumikazu Kanetaka

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： The invention relates to a zoom lens and an imaging apparatus incorporating the same. More particularly, the invention is concerned with a zoom lens that is downsized for use with imaging apparatus inclusive of video cameras and digital cameras. The zoom lens comprises a positive first group G1, a negative lens group G2, a positive third group G3, a positive fourth group G4 and an aperture stop S. At least the first group G1 and the second group G2 move for zooming from the wide-angle end to the telephoto end. The first group G1, the third group G3 and the aperture stop S are positioned more on the object side in a state of the telephoto end than in a state of the wide-angle end. The spacing sandwiched between the first group G1 and the second group G2 grows wide, the spacing sandwiched between the second group G2 and the third group G3 becomes narrows, and the spacing sandwiched between the third group G3 and the fourth lens group G4 grows wide. The first group G1 comprises one positive lens and one negative lens, the second group G2 comprises one positive lens and two negative lenses, the third group G3 comprises, in order from the object side, a double-convex positive lens convex on both object- and image-side surfaces and a negative meniscus lens convex on the object-side surface and concave on the image-side surface, and the fourth group G4 comprises on positive lens.

摘要翻译： 本发明涉及一种变焦镜头及其结合的成像装置。 更具体地，本发明涉及一种缩小尺寸以用于包括摄像机和数码相机的成像设备的变焦镜头。 变焦透镜包括正的第一组G1，负透镜组G2，正三组G3，正四组G4和孔径光阑S.至少第一组G1和第二组G2移动用于从宽 到远摄端。 第一组G1，第三组G3和孔径光阑S在远摄端的状态下比在广角端的状态更靠近物体侧。 夹在第一组G1和第二组G2之间的间隔变宽，夹在第二组G2和第三组G3之间的间隔变窄，并且夹在第三组G3和第四透镜组G4之间的间隔变宽。 第一组G1包括一个正透镜和一个负透镜，第二组G2包括一个正透镜和两个负透镜，第三组G3从物体侧依次包括双凸正透镜， 以及在物体侧表面上凸出的图像侧表面和负弯月形透镜，并且在图像侧表面上凹入，并且第四组G4包括在正透镜上。

公开(公告)号：US20080170300A1

公开(公告)日：2008-07-17

申请号：US12001262

申请日：2007-12-07

申请人： Fumikazu Kanetaka ,  Toshio Takahashi ,  Tomoyuki Satori

发明人： Fumikazu Kanetaka ,  Toshio Takahashi ,  Tomoyuki Satori

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： The invention relates to a less costly zoom lens that can offer a sensible tradeoff between size reductions and high zoom ratios with a well-kept image quality, and that lends itself to an electronic imaging device such as a CCD or CMOS. The zoom lens comprises a positive first lens group G1, a negative second lens group G2, a positive third lens group G3 and a positive fourth lens group G4, wherein zooming is implemented by changing the space between adjacent lens groups. The first lens group G1 comprises one positive lens, the second lens group G2 comprises two lenses, and the fourth lens group G4 comprises one positive lens. The zoom lens satisfies condition (1) needed for making sure an ideal situation for the zoom ratio and low costs and condition (2) needed for the first lens group to comprise a minimum one lens and to hold back chromatic aberration of magnification as much as possible.

摘要翻译： 本发明涉及一种成本较低的变焦镜头，其能够以良好保持的图像质量提供尺寸减小和高变焦比之间的明显权衡，并且其适用于诸如CCD或CMOS的电子成像装置。 变焦透镜包括正的第一透镜组G 1，负的第二透镜组G 2，正的第三透镜组G 3和正的第四透镜组G 4，其中通过改变相邻透镜组之间的空间来实现变焦。 第一透镜组G 1包括一个正透镜，第二透镜组G 2包括两个透镜，第四透镜组G 4包括一个正透镜。 变焦透镜满足为确保变焦倍率的理想情况和第一透镜组所需的低成本和条件（2）所需的条件（1），并且保持倍率的色像差尽可能多 可能。

公开(公告)号：US20060285222A1

公开(公告)日：2006-12-21

申请号：US11445299

申请日：2006-06-02

申请人： Fumikazu Kanetaka

发明人： Fumikazu Kanetaka

IPC分类号： G02B15/14

CPC分类号： G02B15/177

摘要： A zoom optical system comprising, in order from an object side: a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a positive refractive power, a space between the lens units being changed to thereby perform zooming and focusing, wherein the first lens unit is constituted of a negative lens.

公开(公告)号：US08049970B2

公开(公告)日：2011-11-01

申请号：US11811294

申请日：2007-06-07

申请人： Tomoyuki Satori ,  Fumikazu Kanetaka

发明人： Tomoyuki Satori ,  Fumikazu Kanetaka

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： A zoom lens system has, in order from an object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, an aperture stop, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power; during magnification change, the first lens unit, the second lens unit, the third lens unit, the fourth lens unit and the aperture stop move; the first lens unit includes a negative lens and a positive lens in order from the object side; the second lens unit includes a negative lens and a positive lens in order from the object side; the third lens unit includes three or less lenses including one positive lens and one negative lens; and the fourth lens unit includes one positive lens.

摘要翻译： 变焦透镜系统从物体依次具有具有正屈光力的第一透镜单元，具有负屈光力的第二透镜单元，孔径光阑，具有正屈光力的第三透镜单元，以及第四透镜单元 具有正屈光力的透镜单元; 在倍率变化期间，第一透镜单元，第二透镜单元，第三透镜​​单元，第四透镜单元和孔径光阑移动; 第一透镜单元从物体侧依次包括负透镜和正透镜; 第二透镜单元从物体侧依次包括负透镜和正透镜; 第三透镜单元包括三个或更少的透镜，包括一个正透镜和一个负透镜; 并且第四透镜单元包括一个正透镜。

公开(公告)号：US07760441B2

公开(公告)日：2010-07-20

申请号：US12215204

申请日：2008-06-24

申请人： Kenji Ono ,  Keisuke Ichikawa ,  Fumikazu Kanetaka

发明人： Kenji Ono ,  Keisuke Ichikawa ,  Fumikazu Kanetaka

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： The invention relates to a zoom lens and an imaging apparatus incorporating the same. More particularly, the invention is concerned with a zoom lens that is downsized for use with imaging apparatus inclusive of video cameras and digital cameras. The zoom lens comprises a positive first group G1, a negative lens group G2, a positive third group G3, a positive fourth group G4 and an aperture stop S. At least the first group G1 and the second group G2 move for zooming from the wide-angle end to the telephoto end. The first group G1, the third group G3 and the aperture stop S are positioned more on the object side in a state of the telephoto end than in a state of the wide-angle end. The spacing sandwiched between the first group G1 and the second group G2 grows wide, the spacing sandwiched between the second group G2 and the third group G3 becomes narrows, and the spacing sandwiched between the third group G3 and the fourth lens group G4 grows wide. The first group G1 comprises one positive lens and one negative lens, the second group G2 comprises one positive lens and two negative lenses, the third group G3 comprises, in order from the object side, a double-convex positive lens convex on both object- and image-side surfaces and a negative meniscus lens convex on the object-side surface and concave on the image-side surface, and the fourth group G4 comprises on positive lens.

摘要翻译： 本发明涉及一种变焦镜头及其结合的成像装置。 更具体地，本发明涉及一种缩小尺寸以用于包括摄像机和数码相机的成像设备的变焦镜头。 变焦透镜包括正的第一组G1，负透镜组G2，正三组G3，正四组G4和孔径光阑S.至少第一组G1和第二组G2移动用于从宽 到远摄端。 第一组G1，第三组G3和孔径光阑S在远摄端的状态下比在广角端的状态更靠近物体侧。 夹在第一组G1和第二组G2之间的间隔变宽，夹在第二组G2和第三组G3之间的间隔变窄，并且夹在第三组G3和第四透镜组G4之间的间隔变宽。 第一组G1包括一个正透镜和一个负透镜，第二组G2包括一个正透镜和两个负透镜，第三组G3从物体侧依次包括双凸正透镜， 以及在物体侧表面上凸出的图像侧表面和负弯月形透镜，并且在图像侧表面上凹入，并且第四组G4包括在正透镜上。