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1. 发明授权

US5100223A Zoom lens 失效
标题翻译：变焦镜头
公开(公告)号：US5100223A
公开(公告)日：1992-03-31
申请号：US541735
申请日：1990-06-21
申请人： Shusuke Ono , Keizo Ishiguro , Yasuo Nakajima , Hisayuki Ii , Rieko Hiramoto
发明人： Shusuke Ono , Keizo Ishiguro , Yasuo Nakajima , Hisayuki Ii , Rieko Hiramoto
IPC分类号： G02B15/173
CPC分类号： G02B15/173
摘要： A zoom lens of this invention comprises in successive order from the object side a first group having a positive refractive power and fixed, a second group having a negative refracting power for effecting a variation of image magnification by moving on the optical axis, a third group having a positive power for effecting a light condensing action and fixed, and a fourth group moving on the optical axis so as to keep an image surface position to be changed in response to a move of the second group and a move of the object in a constant positional relation with the reference surface. Comparatively large air space is provided between the third and fourth groups of the zoom lens.

2. 发明授权

US5978152A Zoom lens system 失效
标题翻译：变焦镜头系统
公开(公告)号：US5978152A
公开(公告)日：1999-11-02
申请号：US973731
申请日：1998-02-12
申请人： Hiroaki Okayama , Shusuke Ono , Hisayuki Ii , Tsuyoshi Kakimoto
发明人： Hiroaki Okayama , Shusuke Ono , Hisayuki Ii , Tsuyoshi Kakimoto
IPC分类号： G02B13/18 , G02B15/16 , G02B15/173 , G02B15/177 , G02B15/14
CPC分类号： G02B15/173 , G02B15/16 , G02B15/177
摘要： A very compact zoom lens system is provided which has a zoom ratio of 10.times., a bright f-number of 1.4 and a wide angle of view of 59 degree or greater although having a fewer number of lens. The zoom lens system comprises from the object side to the image side: a fixed first lens unit having a negative power lens, a positive power lens and a positive power meniscus lens; a second lens unit having an aspherical surface, having a negative power lens, a negative power biconcave lens and a positive power lens and performing zooming by moving; a fixed third lens unit having an aspherical surface and having a positive power lens, a positive power lens and a negative power lens; and a fourth lens unit having an aspherical surface, having positive power and moves according to zooming and a movement of an object point. The image side surface of the most image side lens of the third lens unit is a concave surface having strong power to the image side. When the focal length at the wide-angle limit is fw, the angle of view at the wide-angle limit is .omega., the focal length of the first lens unit is f1 and the focal length of the second lens unit is f2, the following condition is satisfied:0.17
摘要翻译： PCT No.PCT / JP97 / 01210 Sec。 371日期1998年2月12日 102（e）日期1998年2月12日PCT提交1997年4月8日PCT公布。公开号WO97 / 38340 日期1997年10月16日提供了一种非常紧凑的变焦透镜系统，其具有10倍的变焦倍数，1.4的明亮f数和59度或更大的宽视角，尽管具有较少数量的透镜。变焦透镜系统包括从物体侧到图像侧：具有负功率透镜，正光焦度透镜和正功率弯月形透镜的固定第一透镜单元; 具有非球面的第二透镜单元，具有负光焦度透镜，负光焦度透镜和正光焦度透镜，并通过移动进行变焦; 具有非球面的固定的第三透镜单元，具有正光焦度透镜，正光焦度透镜和负光焦度透镜; 以及具有非球面的第四透镜单元，具有正的功率并且根据变焦和物点的移动而移动。第三透镜单元的最大像侧透镜的像侧表面是对像侧具有强大功率的凹面。当广角限制的焦距为fw时，广角极限处的视角为ω，第一透镜单元的焦距为f1，第二透镜单元的焦距为f2，以下条件满足：0.17 <（fwxtanω）/（f1x | f2 |）+ E，fra 1/2 + EE <0.39。

3. 发明授权

US5235466A Zoom lens 失效
标题翻译：变焦镜头
公开(公告)号：US5235466A
公开(公告)日：1993-08-10
申请号：US942826
申请日：1992-09-10
申请人： Shusuke Ono , Hisayuki Ii
发明人： Shusuke Ono , Hisayuki Ii
IPC分类号： G02B13/18 , G02B15/16 , G02B15/173 , H04N5/225
CPC分类号： G02B15/173
摘要： A zoom lens comprises sequentially from a side of an object: a fixed first lens group constituted by a convex lens, a double convex lens and a meniscus convex lens; a movable second lens group constituted by a meniscus convex lens, a double concave lens and a convex lens; a fixed third lens group constituted by a single lens having at least one aspherical surface; and a movable fourth lens group constituted by a concave lens and two convex lenses at least one of which has at least one aspherical surface.

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