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1. 发明公开

EP1391767A1 Variable focal length lens using switchable lens groups 审中-公开
标题翻译： Objektiv mit variabler Brennweite schaltbar mittels austauschbarer Linsengruppen
公开(公告)号：EP1391767A1
公开(公告)日：2004-02-25
申请号：EP03077514.2
申请日：2003-08-11
申请人： EASTMAN KODAK COMPANY
发明人： Lewis, Alan E. , Lawther, Joel S.
IPC分类号： G02B15/02
CPC分类号： G02B15/02 , G02B15/14
摘要： A two position variable focal length lens is provided. The variable focal length lens includes a common lens element moveably positioned on an optical axis; a wide angle lens element moveable between a first location removed from the optical axis and a first position on the optical axis on an image side of the common lens element; and a telephoto lens element moveable between a second location removed from the optical axis and a second position on the optical axis on the image side of the common lens element. A magnification ratio change is effected by moving the common lens element along the optical axis and switching between the wide angle lens element located at the first position on the optical axis and the telephoto lens element located at the second position on the optical axis.
摘要翻译：提供两位置可变焦距透镜。可变焦距透镜包括可移动地定位在光轴上的公共透镜元件; 可在从所述光轴移除的第一位置与所述公共透镜元件的像侧上的所述光轴上的第一位置之间移动的广角镜头元件; 以及远摄透镜元件，其可在从所述光轴移除的第二位置与所述公共透镜元件的像侧上的所述光轴上的第二位置之间移动。通过使共透镜元件沿着光轴移动并且位于光轴上的第一位置的广角透镜元件与位于光轴上的第二位置的远摄透镜元件之间进行切换来实现放大率变化。

2. 发明公开

EP1271216A2 Two group zoom lens having weak front element 审中-公开
标题翻译：两个透镜组的变焦镜头，其包括一个前置镜头弱
公开(公告)号：EP1271216A2
公开(公告)日：2003-01-02
申请号：EP02077240.6
申请日：2002-06-10
申请人： EASTMAN KODAK COMPANY
发明人： Lewis, Alan E.
IPC分类号： G02B15/16 , G02B9/12
CPC分类号： G02B15/161
摘要： A zoom lens is provided. The zoom lens includes a positive power first lens group (12) having a first lens element and a second lens element, and a negative power second lens group having a third lens element. The first lens element can be made from plastic having either or both of its surfaces aspheric with a meniscus shape concave or convex to an object side. The first lens group includes a variable iris having a mechanical aperture stop positioned between the first lens element and the second lens element.

3. 发明公开

EP1271216A3 Two group zoom lens having weak front element 审中-公开
标题翻译： Zoomobjektiv aus zwei Linsengruppen，das eine schwache Frontlinse aufweist
公开(公告)号：EP1271216A3
公开(公告)日：2004-11-03
申请号：EP02077240.6
申请日：2002-06-10
申请人： EASTMAN KODAK COMPANY
发明人： Lewis, Alan E.
IPC分类号： G02B15/16 , G02B9/12
CPC分类号： G02B15/161
摘要： A zoom lens is provided. The zoom lens includes a positive power first lens group (12) having a first lens element and a second lens element, and a negative power second lens group having a third lens element. The first lens element can be made from plastic having either or both of its surfaces aspheric with a meniscus shape concave or convex to an object side. The first lens group includes a variable iris having a mechanical aperture stop positioned between the first lens element and the second lens element.
摘要翻译：提供变焦镜头。变焦透镜包括具有第一透镜元件和第二透镜元件的正光焦度第一透镜组（12）和具有第三透镜元件的负光焦度第二透镜组。第一透镜元件可以由塑料制成，其中的一个或两个表面非球面地具有向对象侧凹或凸的弯月面形状。第一透镜组包括可变虹膜，其具有位于第一透镜元件和第二透镜元件之间的机械孔径光阑。

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