公开(公告)号：US07206137B2

公开(公告)日：2007-04-17

申请号：US11102051

申请日：2005-04-08

申请人： Toru Nakatani ,  Mamoru Terada ,  Kenshi Nabeta

发明人： Toru Nakatani ,  Mamoru Terada ,  Kenshi Nabeta

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： The present invention provides a compact, high-performance, and easy-to-manufacture taking optical system that offers an extremely high zoom ratio. The taking optical system includes, from the subject side, a first lens group having a positive optical power, a second lens group having a negative optical power, a third lens group having a positive optical power, and a fourth lens group having a positive optical power. The taking optical system achieves zooming by the movements of the first to fourth lens groups and focusing by the movement of the fourth lens group. The taking optical system fulfills the following conditions: 0.05≦f3/f4≦0.95 and 7.0≦f1/fw≦20.0, where f1, f3, and f4 represent the focal lengths of the first, third, and fourth lens groups, respectively, and fw represents the focal length of the entire taking optical system at the wide-angle end thereof.

摘要翻译： 本发明提供了一种紧凑，高性能，易于制造的拍摄光学系统，其提供了非常高的变焦比。 拍摄光学系统包括从被摄体侧具有正光焦度的第一透镜组，具有负光焦度的第二透镜组，具有正光焦度的第三透镜组，以及具有正光学功能的第四透镜组 功率。 拍摄光学系统通过第一至第四透镜组的运动实现变焦，并通过第四透镜组的移动进行聚焦。 拍摄光学系统满足以下条件：0.05 <= f 3 / f 4 <= 0.95和7.0 <= f 1 /fw<=20.0，其中f 1，f 3和f 4表示第一， 第三透镜组和第四透镜组，fw表示整个拍摄光学系统在其广角端的焦距。

公开(公告)号：US20060132928A1

公开(公告)日：2006-06-22

申请号：US11102051

申请日：2005-04-08

申请人： Toru Nakatani ,  Mamoru Terada ,  Kenshi Nabeta

发明人： Toru Nakatani ,  Mamoru Terada ,  Kenshi Nabeta

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： The present invention provides a compact, high-performance, and easy-to-manufacture taking optical system that offers an extremely high zoom ratio. The taking optical system includes, from the subject side, a first lens group having a positive optical power, a second lens group having a negative optical power, a third lens group having a positive optical power, and a fourth lens group having a positive optical power. The taking optical system achieves zooming by the movements of the first to fourth lens groups and focusing by the movement of the fourth lens group. The taking optical system fulfills the following conditions: 0.05≦f3/f4≦0.95 and 7.0≦f1/fw≦20.0, where f1, f3, and f4 represent the focal lengths of the first, third, and fourth lens groups, respectively, and fw represents the focal length of the entire taking optical system at the wide-angle end thereof.

摘要翻译： 本发明提供了一种紧凑，高性能，易于制造的拍摄光学系统，其提供了非常高的变焦比。 拍摄光学系统包括从被摄体侧具有正光焦度的第一透镜组，具有负光焦度的第二透镜组，具有正光焦度的第三透镜组，以及具有正光学功能的第四透镜组 功率。 拍摄光学系统通过第一至第四透镜组的运动实现变焦，并通过第四透镜组的移动进行聚焦。 拍摄光学系统满足以下条件：0.05 <= f 3 / f 4 <= 0.95和7.0 <= f 1 /fw<=20.0，其中f 1，f 3和f 4表示第一， 第三透镜组和第四透镜组，fw表示整个拍摄光学系统在其广角端的焦距。

公开(公告)号：US20060140606A1

公开(公告)日：2006-06-29

申请号：US11319872

申请日：2005-12-27

申请人： Mamoru Terada ,  Kenshi Nabeta ,  Toru Nakatani

发明人： Mamoru Terada ,  Kenshi Nabeta ,  Toru Nakatani

IPC分类号： G03B17/00

CPC分类号： G02B15/173

摘要： A taking lens system is provided with, from the side of the object to be photographed, a first lens unit (G1) having positive optical power, a second lens unit (G2) having negative optical power, a third lens unit (G3) having positive optical power and a fourth lens unit (G4) having positive optical power. Zooming is performed by moving the first to fourth lens units (G1) to (G4), and focusing is performed by moving the fourth lens unit (G4). When the distance from the most object-to-be-photographed side surface (r1) of the first lens unit (G1) to the imaging surface at the wide angle end is TLw, the overall focal length of the taking lens system at the telephoto end is ft, the overall focal length of the taking lens system at the wide angle end is fw, and the focal length of the first lens unit (G5) is fl, relationships 0.5≦TLw/ft≦1.0 and 6.0≦fl/fw≦20.0 are satisfied.

摘要翻译： 摄影镜头系统从被摄体的侧面设置具有正光焦度的第一透镜单元（G 1），具有负光焦度的第二透镜单元（G 2），第三透镜​​单元（G 3）和具有正光焦度的第四透镜单元（G 4）。 通过将第一至第四透镜单元（G 1）移动到（G 4）来执行变焦，并且通过移动第四透镜单元（G 4）来进行聚焦。 当从第一透镜单元（G 1）的最被摄体侧面（r 1）到广角端的成像面的距离为TLw时，摄影镜头系统的整体焦距为 长焦端为ft，广角端的拍摄镜头系统的整体焦距为fw，第一镜头单元（G 5）的焦距为fl，关系为0.5 <= TLw / ft <= 1.0， 6.0 <= fl / fw <= 20.0。

公开(公告)号：US07489451B2

公开(公告)日：2009-02-10

申请号：US11319872

申请日：2005-12-27

申请人： Mamoru Terada ,  Kenshi Nabeta ,  Toru Nakatani

发明人： Mamoru Terada ,  Kenshi Nabeta ,  Toru Nakatani

IPC分类号： G02B15/14 ,  G03B17/00

CPC分类号： G02B15/173

摘要： A taking lens system is provided with, from the side of the object to be photographed, a first lens unit (G1) having positive optical power, a second lens unit (G2) having negative optical power, a third lens unit (G3) having positive optical power and a fourth lens unit (G4) having positive optical power. Zooming is performed by moving the first to fourth lens units (G1) to (G4), and focusing is performed by moving the fourth lens unit (G4). When the distance from the most object-to-be-photographed side surface (r1) of the first lens unit (G1) to the imaging surface at the wide angle end is TLw, the overall focal length of the taking lens system at the telephoto end is ft, the overall focal length of the taking lens system at the wide angle end is fw, and the focal length of the first lens unit (G1) is fl, relationships 0.5≦TLw/ft≦1.0 and 6.0≦fl/fw≦20.0 are satisfied.

摘要翻译： 拍摄镜头系统从被摄体的一侧设置有具有正光焦度的第一透镜单元（G1），具有负光焦度的第二透镜单元（G2），具有负光学功率的第三透镜单元（G3），具有 正光学功率和具有正光焦度的第四透镜单元（G4）。 通过将第一至第四透镜单元（G1）移动到（G4）进行变焦，并且通过移动第四透镜单元（G4）来进行聚焦。 当从第一透镜单元（G1）的最被摄体侧面（r1）到广角端的成像面的距离为TLw时，长焦摄影镜头系统的整体焦距 在广角端的拍摄镜头系统的整体焦距为fw，第一透镜单元（G1）的焦距为fl，关系式0.5 <= TLw / ft <= 1.0，6.0 <= fl / fw <= 20.0。