公开(公告)号：US08605365B2

公开(公告)日：2013-12-10

申请号：US13391668

申请日：2010-08-13

申请人： Junichi Fujisaki ,  Takashi Enomoto ,  Tomoya Koga

发明人： Junichi Fujisaki ,  Takashi Enomoto ,  Tomoya Koga

IPC分类号： G02B15/14

CPC分类号： G02B15/177

摘要： The objective of the present invention is to provide a zoom lens system having an f-number of approximately 1.3 at the wide extremity, a half angle-of-view of 75 degrees, and a zoom ratio of approximately 3:1. The solution to this objective is to provide a zoom lens system including a first lens group, having a negative refractive power, a diaphragm, and a second lens group, having a positive refractive power, in that order from the object side; wherein the first lens group and the second lens group move in the optical axis direction so that the distance therebetween decreases upon zooming from the wide-angle extremity to the telephoto extremity.

摘要翻译： 本发明的目的是提供一种变焦透镜系统，其在宽端具有约1.3的f数，75度的半视角和大约3:1的变焦比。 该目的的解决方案是从物体侧依次提供具有正折光力的具有负折光力的第一透镜组，第二透镜组和第二透镜组的变焦透镜系统; 其中所述第一透镜组和所述第二透镜组在所述光轴方向上移动，使得在从所述广角端到远摄端的变焦时，其间的距离减小。

公开(公告)号：US20120147480A1

公开(公告)日：2012-06-14

申请号：US13391668

申请日：2010-08-13

申请人： Junichi Fujisaki ,  Takashi Enomoto ,  Tomoya Koga

发明人： Junichi Fujisaki ,  Takashi Enomoto ,  Tomoya Koga

IPC分类号： G02B15/14

CPC分类号： G02B15/177

摘要： The objective of the present invention is to provide a zoom lens system having an f-number of approximately 1.3 at the wide extremity, a half angle-of-view of 75 degrees, and a zoom ratio of approximately 3:1. The solution to this objective is to provide a zoom lens system including a first lens group, having a negative refractive power, a diaphragm, and a second lens group, having a positive refractive power, in that order from the object side; wherein the first lens group and the second lens group move in the optical axis direction so that the distance therebetween decreases upon zooming from the wide-angle extremity to the telephoto extremity,

摘要翻译： 本发明的目的是提供一种变焦透镜系统，其在宽端具有约1.3的f数，75度的半视角和大约3:1的变焦比。 该目的的解决方案是从物体侧依次提供具有正折光力的具有负折光力的第一透镜组，第二透镜组和第二透镜组的变焦透镜系统; 其中所述第一透镜组和所述第二透镜组在所述光轴方向上移动，使得在从所述广角端到远摄端的变焦时，所述第一透镜组和所述第二透镜组之间的距离减小，

公开(公告)号：US20060056066A1

公开(公告)日：2006-03-16

申请号：US11208525

申请日：2005-08-23

申请人： Junichi Fujisaki ,  Takayuki Ito

发明人： Junichi Fujisaki ,  Takayuki Ito

IPC分类号： G02B13/02

CPC分类号： G02B13/02

摘要： A telephoto lens system of a four-lens-group arrangement includes a negative first lens group, a positive or negative second lens group, a negative third lens group and a positive fourth lens group. The telephoto lens system of the four-lens-group arrangement is constituted by less than six lens elements in total. The positive or negative second lens group is constituted by a positive lens element and a negative lens element which are cemented to each other, in this order from the object. The positive lens element has a convex surface with a larger curvature facing toward the object. The positive or negative second lens group satisfies the following condition: 0.8

摘要翻译： 四透镜组布置的长焦透镜系统包括负第一透镜组，正或负第二透镜组，负第三透镜组和正第四透镜组。 四透镜组布置的长焦透镜系统总共由少于六个透镜元件构成。 正或负第二透镜组由从物体的顺序彼此粘合的正透镜元件和负透镜元件构成。 正透镜元件具有面向物体的较大曲率的凸面。 正或负第二透镜组满足以下条件

公开(公告)号：US07253972B2

公开(公告)日：2007-08-07

申请号：US11208525

申请日：2005-08-23

申请人： Junichi Fujisaki ,  Takayuki Ito

发明人： Junichi Fujisaki ,  Takayuki Ito

IPC分类号： G02B13/02

CPC分类号： G02B13/02

摘要： A telephoto lens system of a four-lens-group arrangement includes a negative first lens group, a positive or negative second lens group, a negative third lens group and a positive fourth lens group. The telephoto lens system of the four-lens-group arrangement is constituted by less than six lens elements in total. The positive or negative second lens group is constituted by a positive lens element and a negative lens element which are cemented to each other, in this order from the object. The positive lens element has a convex surface with a larger curvature facing toward the object. The positive or negative second lens group satisfies the following condition: 0.8

摘要翻译： 四透镜组布置的长焦透镜系统包括负第一透镜组，正或负第二透镜组，负第三透镜组和正第四透镜组。 四透镜组布置的长焦透镜系统总共由少于六个透镜元件构成。 正或负第二透镜组由从物体的顺序彼此粘合的正透镜元件和负透镜元件构成。 正透镜元件具有面向物体的较大曲率的凸面。 正或负第二透镜组满足以下条件：<？in-line-formula description =“In-line formula”end =“lead”？> 0.8