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1.发明授权Zoom assembly having zoom lens with plurality of lens group that move together or differentially for zooming and focusing 有权具有变焦透镜的变焦组件具有多个透镜组，它们一起移动或差分地进行变焦和聚焦
公开(公告)号：US6151171A
公开(公告)日：2000-11-21
申请号：US281898
申请日：1999-03-31
CPC分类号： G02B15/163 , G02B7/102
摘要： It is an object of the present invention to provide a very compact zoom assembly with a minimum number of parts. Another object of this invention is to provide a zoom assembly which does not require guide rods and utilizes with only one motor for both zooming and focusing. Briefly summarized, according to one aspect of the present invention, a zoom assembly includes a zoom lens defining an optical axis. This zoom lens is capable of operating in a plurality of different zoom positions and of focus adjustment for different object distances in each of the zoom positions. The zoom positions are (i) two extreme zoom positions (a wide angle position and a telephoto position), and (ii) a plurality of intermediate zoom positions. The zoom lens includes at least a first movable lens group and a second movable lens group. These first and second lens group are separated from one another by a variable distance. The first and second movable lens groups move (i) together, at the same speed and direction in order to focus at one of the extreme zoom positions and at an adjacent intermediate zoom position; and (ii) differentially in order to focus at another one of the extreme zoom positions.
摘要翻译： 本发明的目的是提供一种具有最小数量的部件的非常紧凑的变焦组件。 本发明的另一个目的是提供一种变焦组件，其不需要导杆并且仅利用一个电动机来进行变焦和聚焦。 简单总结，根据本发明的一个方面，变焦组件包括限定光轴的变焦透镜。 该变焦透镜能够在多个变焦位置中进行操作，并且可以在每个变焦位置中对不同物体距离进行焦点调整。 变焦位置是（i）两个极端变焦位置（广角位置和望远位置），和（ii）多个中间变焦位置。 变焦透镜至少包括第一可移动透镜组和第二可移动透镜组。 这些第一透镜组和第二透镜组彼此间隔可变距离。 第一和第二可移动透镜组以相同的速度和方向移动（i），以便聚焦在极端变焦位置之一和相邻的中间变焦位置处; 和（ii）差异化以便聚焦在另一个极端变焦位置。
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公开(公告)号：US5966247A
公开(公告)日：1999-10-12
申请号：US994313
申请日：1997-12-19
IPC分类号： G02B13/18 , G02B15/177 , G02B15/20 , G20B15/22
CPC分类号： G02B15/177
摘要： A zoom lens comprises a plurality of lens elements arranged into three zooming lens units. These zooming lens units are spaced from one another by axial distances that vary during zooming. The lens units are a negative power front lens unit, a positive power middle lens unit and a negative power rear lens unit. At least one of the lens units continually moves away from the image plane, as the zoom lens zooms from a wide angle position toward a telephoto position so that the distance from this lens unit to the image plane varies in sigmoidal relation with respect to the focal length of the zoom lens.
摘要翻译： 变焦透镜包括布置成三个变焦透镜单元的多个透镜元件。 这些变焦镜头单元在变焦期间彼此间隔开轴向距离。 透镜单元是负功率前透镜单元，正功率中间透镜单元和负功率后透镜单元。 透镜单元中的至少一个连续地远离图像平面移动，因为变焦透镜从广角位置朝远摄位置放大，使得从该透镜单元到像面的距离相对于焦点以S形关系变化 变焦镜头的长度。
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