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1. 发明申请

US20030072085A1 Zoom lens system 有权
标题翻译：变焦镜头系统
公开(公告)号：US20030072085A1
公开(公告)日：2003-04-17
申请号：US10124271
申请日：2002-04-18
申请人： Nikon Corporation
发明人： Keiko Mizuguchi , Atsushi Shibayama
IPC分类号： G02B015/14
CPC分类号： G02B15/177
摘要： The present invention provides a zoom lens system suitable for an image gathering system using a solid-state imaging device, having a zoom ratio of about three, a small total lens length, and superb optical performance. According to one aspect, in order from the object side, a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power. Zooming is carried out by varying distances between adjacent lens groups. The first lens group includes two negative lens elements and a positive lens element. The second lens group includes three lens elements consisting of a first positive lens element, a second positive lens element, and a negative lens element. The third lens group includes at least one positive lens element. Predetermined conditional expressions are satisfied.
摘要翻译：本发明提供一种适用于使用固态成像装置的图像采集系统的变焦透镜系统，其具有大约三倍的变焦倍数，小的全透镜长度和极好的光学性能。根据一个方面，从物体侧开始，具有负折光力的第一透镜组，具有正折射光焦度的第二透镜组和具有正折射光焦度的第三透镜组。通过相邻镜头组之间的距离变化来进行变焦。第一透镜组包括两个负透镜元件和正透镜元件。第二透镜组包括由第一正透镜元件，第二正透镜元件和负透镜元件组成的三个透镜元件。第三透镜组包括至少一个正透镜元件。满足预定条件表达式。

2. 发明申请

US20040021958A1 Fisheye lens 有权
标题翻译：鱼眼镜头
公开(公告)号：US20040021958A1
公开(公告)日：2004-02-05
申请号：US10631760
申请日：2003-08-01
申请人： Nikon Corporation
发明人： Keiko Mizuguchi
IPC分类号： G02B009/04
CPC分类号： G02B13/06
摘要： An object of the present invention is to provide a fisheye lens, in spite of its compactness, having an angle of view of 180 degrees and a fast f-number of 2.8 with securing sufficient back focal length and suitable for a digital camera. The fisheye lens consists of a front lens group G1 having negative refractive power and a rear lens group G2 having positive refractive power locating with a space along the optical axis apart from the front lens group G1. The front lens group G1 includes a plurality of negative lens components, L1 and L2. The rear lens group G2 includes at least one cemented lens L5, and given conditional expressions are satisfied.
摘要翻译：本发明的目的是提供一种鱼眼镜头，尽管它的紧凑性，具有180度的视角和2.8倍的快速f值，确保足够的后焦距并适合于数码相机。鱼眼镜头由具有负屈光力的前透镜组G1和具有正折射力的后透镜组G2组成，其具有沿着与前透镜组G1分开的光轴的空间。前透镜组G1包括多个负透镜部件L1和L2。后透镜组G2包括至少一个胶合透镜L5，并且给出条件表达式。

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