专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20120087018A1 ZOOM LENS 有权
标题翻译：变焦镜头
公开(公告)号：US20120087018A1
公开(公告)日：2012-04-12
申请号：US13269298
申请日：2011-10-07
申请人： Ryotaro IZUMI
发明人： Ryotaro IZUMI
IPC分类号： G02B15/14
CPC分类号： G02B15/00 , G02B13/006 , G02B13/009 , G02B13/18 , G02B15/155 , G02B15/173
摘要： There is provided a zoom lens which is suitable for a digital still camera and a video camera and includes a small number of lenses, especially a zoom lens which has an angle of view of 75° or more at the wide-angle end and a variable power ratio of about ×10. The zoom lens includes a first lens group with positive refractive power, a second lens group with negative refractive power, a third lens group with positive refractive power, and, a fourth lens group with positive refractive power. The zoom lens varies power by changing an interval of each neighboring lens groups. The first lens group is composed of a negative lens and a positive lens. The third lens group is composed of an aperture stop, a cemented lens formed by a positive lens in a biconvex shape and a negative lens, and a positive lens.
摘要翻译：提供了一种适用于数码相机和摄像机的变焦镜头，并且包括少数透镜，特别是在广角端具有75°或更大视角的变焦透镜，功率比约为10。变焦透镜包括具有正折光力的第一透镜组，具有负折光力的第二透镜组，具有正折光力的第三透镜组，以及具有正屈光力的第四透镜组。变焦镜头通过改变每个相邻镜头组的间隔来改变功率。第一透镜组由负透镜和正透镜组成。第三透镜组由孔径光阑，由双凸形的正透镜和负透镜形成的胶合透镜和正透镜构成。

2. 发明授权

US08599492B2 Zoom lens 有权
标题翻译：变焦镜头
公开(公告)号：US08599492B2
公开(公告)日：2013-12-03
申请号：US13269298
申请日：2011-10-07
申请人： Ryotaro Izumi
发明人： Ryotaro Izumi
IPC分类号： G02B15/00 , G02B15/15
CPC分类号： G02B15/00 , G02B13/006 , G02B13/009 , G02B13/18 , G02B15/155 , G02B15/173
摘要： There is provided a zoom lens which is suitable for a digital still camera and a video camera and includes a small number of lenses, especially a zoom lens which has an angle of view of 75° or more at the wide-angle end and a variable power ratio of about ×10. The zoom lens includes a first lens group with positive refractive power, a second lens group with negative refractive power, a third lens group with positive refractive power, and, a fourth lens group with positive refractive power. The zoom lens varies power by changing an interval of each neighboring lens groups. The first lens group is composed of a negative lens and a positive lens. The third lens group is composed of an aperture stop, a cemented lens formed by a positive lens in a biconvex shape and a negative lens, and a positive lens.
摘要翻译：提供了一种适用于数码相机和摄像机的变焦镜头，并且包括少数透镜，特别是在广角端具有75°或更大视角的变焦透镜，功率比约为10。变焦透镜包括具有正折光力的第一透镜组，具有负折光力的第二透镜组，具有正折光力的第三透镜组，以及具有正屈光力的第四透镜组。变焦镜头通过改变每个相邻镜头组的间隔来改变功率。第一透镜组由负透镜和正透镜组成。第三透镜组由孔径光阑，由双凸形的正透镜和负透镜形成的胶合透镜和正透镜构成。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式