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1. 发明申请

US20090303607A1 ANAMORPHIC CONVERTER AND IMAGE PROJECTION SYSTEM 有权
标题翻译：不稳定转换器和图像投影系统
公开(公告)号：US20090303607A1
公开(公告)日：2009-12-10
申请号：US12473753
申请日：2009-05-28
申请人： Kazuhiko INOUE , Yasumasa Sawai
发明人： Kazuhiko INOUE , Yasumasa Sawai
IPC分类号： G02B13/08
CPC分类号： G02B13/08 , G02B7/04 , G02B13/04 , G03B21/147 , G03B37/06
摘要： An anamorphic converter includes, from a projected-surface side, a first group and a second group. The first group includes one or more lens elements and has a negative power at least in a main magnification direction. The second group includes one or more lens elements and has a positive power at least in the main magnification direction. Of optical surfaces, a last surface of the first group and a first surface of the second group: [1] have a power in both main magnification and sub-magnification directions; [2] are convex toward the projected-surface side in both main magnification and sub-magnification directions in a region having an area that is ¼ or more of an optical effective region area including a center portion of each of the last and first optical surfaces; and [3] at least one of the last and first optical surfaces is a free curved surface.
摘要翻译：变形转换器包括从投影表面侧的第一组和第二组。第一组包括一个或多个透镜元件，并且至少在主放大方向上具有负的功率。第二组包括一个或多个透镜元件，并且至少在主放大方向上具有正功率。在光学表面中，第一组的最后一个表面和第二组的第一表面[1]在主放大和次放大方向均具有功率; 在具有包括最后和第一光学表面的每个的中心部分的光学有效区域的面积为¼以上的区域的区域中，在主放大倍数和副放大倍率方向上朝向投影面侧凸出 ; 和[3]最后和第一光学表面中的至少一个是自由曲面。

2. 发明申请

US20120307371A1 Variable-Focal-Length Projection Lens System and Projection Apparatus 有权
标题翻译：可变焦距投影镜头系统和投影仪
公开(公告)号：US20120307371A1
公开(公告)日：2012-12-06
申请号：US13483987
申请日：2012-05-30
申请人： Katsuhiro TAKAMOTO , Kazuhiko INOUE , Sadanobu IMAMURA , Kohei WATARU
发明人： Katsuhiro TAKAMOTO , Kazuhiko INOUE , Sadanobu IMAMURA , Kohei WATARU
IPC分类号： G02B15/14
CPC分类号： G02B13/16 , G02B15/14
摘要： A variable-focal-length lens system for projection which achieves focusing by movement of the entire system has a second to a fourth lens group as focal-length-varying lens groups and a first lens group as a distance-compensation lens group. The second to fourth lens groups individually move in the optical axis direction to vary the group-to-group distances so as to vary the focal length of the entire system. During focusing, the first lens group moves in the optical axis direction such that, as the projection distance varies from a remote distance to a close distance, curvature of field varies to the under side.
摘要翻译：通过整个系统的移动实现聚焦的可变焦距透镜系统具有作为焦距变化透镜组的第二至第四透镜组和作为距离补偿透镜组的第一透镜组。第二至第四透镜组在光轴方向上分别移动以改变组与组的距离，从而改变整个系统的焦距。在聚焦期间，第一透镜组沿光轴方向移动，使得当投射距离从远距离变化到近距离时，曲率变化到下侧。

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