公开(公告)号：US5860030A

公开(公告)日：1999-01-12

申请号：US521407

申请日：1995-08-30

申请人： Kanehiro Tada ,  Ryuzo Ohta

发明人： Kanehiro Tada ,  Ryuzo Ohta

IPC分类号： G02B7/08 ,  G03B17/04 ,  G03B17/00

CPC分类号： G03B17/04

摘要： In a new retractable lens barrel of a type wherein a movable barrel is mounted protrudably in an optical axis direction from a fixed barrel or a camera body and filming is possible when the movable barrel is in a protruded state and comprising a movable lens of a variable power and/or focusing system, a space formed when the movable barrel is protruded from the fixed barrel or camera body is made a space in which the movable lens is movable during filming and the casing of the iris unit and a lens holder of a fixed lens are formed integrally. Because the space in which the movable lens is movable during filming is used to accommodate the movable barrel when the camera is not being used and the movable barrel is retracted, the length of the retracted lens barrel in the front-rear direction can be made short. Also, because the casing of the iris unit and the lens holder of a fixed lens are formed integrally, the number of parts is reduced and the optical axes of different lens groups and the iris unit are not readily misaligned when the lens barrel is being assembled.

摘要翻译： 在一种新的可伸缩镜筒中，其中可移动镜筒从固定镜筒或照相机主体沿光轴方向突出地安装，并且当可动镜筒处于突出状态并且包括可变镜头的可移动镜片时，可以进行成像 动力和/或聚焦系统，当可动筒从固定筒或照相机体突出时形成的空间被制成一个空间，在该空间中，可动镜头在成像过程中可移动，并且可旋转镜头的壳体和固定 透镜一体形成。 因为在成像期间可移动透镜可移动的空间用于容纳可移动的镜筒，当照相机未被使用并且可移动的镜筒缩回时，缩回镜筒在前后方向上的长度可以缩短 。 此外，由于可变光学单元的壳体和固定透镜的透镜保持器一体地形成，所以当组装透镜镜筒时，部件的数量减少，不同透镜组和光圈单元的光轴不容易对准 。