公开(公告)号：US20060181781A1

公开(公告)日：2006-08-17

申请号：US11343037

申请日：2006-01-30

申请人： Atsushi Yamashita ,  Shinsuke Nobe

发明人： Atsushi Yamashita ,  Shinsuke Nobe

IPC分类号： G02B15/14

CPC分类号： G02B15/177

摘要： A zoom lens system includes a first lens group which has a negative refractive power, a second lens group which has a positive refractive power, and a third lens group which has a positive refractive power in this order from the object side and changes the distances among these lens groups to vary the power from the wide-angle end to the telephoto end. The second lens group has a three-element cemented lens including a positive lens c1, a negative lens c2, and a positive lens c3.

摘要翻译： 变焦透镜系统包括具有负屈光力的第一透镜组，具有正折光力的第二透镜组和具有正折射力的第三透镜组，并且改变距物体的距离 这些透镜组可以改变从广角端到远摄端的功率。 第二透镜组具有包括正透镜c 1，负透镜c 2和正透镜c 3的三像素胶合透镜。

公开(公告)号：US07215484B2

公开(公告)日：2007-05-08

申请号：US11343037

申请日：2006-01-30

申请人： Atsushi Yamashita ,  Shinsuke Nobe

发明人： Atsushi Yamashita ,  Shinsuke Nobe

IPC分类号： G02B15/14

CPC分类号： G02B15/177

摘要： A zoom lens system includes a first lens group which has a negative refractive power, a second lens group which has a positive refractive power, and a third lens group which has a positive refractive power in this order from the object side and changes the distances among these lens groups to vary the power from the wide-angle end to the telephoto end. The second lens group has a three-element cemented lens including a positive lens c1, a negative lens c2, and a positive lens c3.

摘要翻译： 变焦透镜系统包括具有负屈光力的第一透镜组，具有正折光力的第二透镜组和具有正折射力的第三透镜组，并且改变距物体的距离 这些透镜组可以改变从广角端到远摄端的功率。 第二透镜组具有包括正透镜c 1，负透镜c 2和正透镜c 3的三像素胶合透镜。

公开(公告)号：US06646815B2

公开(公告)日：2003-11-11

申请号：US10024263

申请日：2001-12-21

申请人： Shinsuke Nobe

发明人： Shinsuke Nobe

IPC分类号： G02B1514

CPC分类号： G02B15/177 ,  G03B13/22

摘要： A zoom lens, comprises: three lens groups including a first lens group having a negative refracting power, a second lens group having a positive refracting power and a third lens group having a positive refracting power arranged serially in this order from the object side. The second lens group comprises a positive lens, a cemented lens including a positive lens and a negative lens and one lens arranged serially in this order from the object side. The following conditional expression is satisfied; 0.4

摘要翻译： 变焦透镜包括：三个透镜组，包括具有负折射力的第一透镜组，具有正折射率的第二透镜组和具有正折射率的第三透镜组，所述第三透镜组从物体侧依次排列。 第二透镜组包括正透镜，包括正透镜和负透镜的胶合透镜以及从物体侧依次排列的一个透镜。 满足以下条件表达式：其中f2表示第二透镜组的焦距，fw表示广角端的总光学系统的焦距。