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1. 发明授权

US06081389A Zoom lens of retrofocus type 失效
标题翻译：变焦镜头
公开(公告)号：US06081389A
公开(公告)日：2000-06-27
申请号：US123442
申请日：1998-07-28
申请人： Hidemi Takayama , Hiroki Nakayama , Akihisa Horiuchi , Fumihito Wachi
发明人： Hidemi Takayama , Hiroki Nakayama , Akihisa Horiuchi , Fumihito Wachi
IPC分类号： G02B13/04 , G02B15/177 , G02B15/14 , G02B5/18
CPC分类号： G02B13/22 , G02B13/04 , G02B15/177
摘要： A zoom lens of the retrofocus type includes, in order from a longer-distance conjugate point side to a shorter-distance conjugate point side, a front lens unit of negative refractive power, and a rear lens unit of positive refractive power, wherein a separation between the front lens unit and the rear lens unit varies according to variation of magnification, and at least one of the front lens unit and the rear lens unit is provided with a diffractive optical element.
摘要翻译：后焦点类型的变焦镜头包括从较长距离共轭点侧到较短距离共轭点侧依次具有负屈光力的前透镜单元和正屈光力的后透镜单元，其中分离前透镜单元和后透镜单元之间根据放大率的变化而变化，并且前透镜单元和后透镜单元中的至少一个设置有衍射光学元件。

2. 发明授权

US5739961A Zoom lens 失效
公开(公告)号：US5739961A
公开(公告)日：1998-04-14
申请号：US474186
申请日：1995-06-07
申请人： Hiroki Nakayama , Akihisa Horiuchi , Hitoshi Mukaiya , Yasunori Murata , Fumihito Wachi
发明人： Hiroki Nakayama , Akihisa Horiuchi , Hitoshi Mukaiya , Yasunori Murata , Fumihito Wachi
IPC分类号： G02B15/173 , G02B15/14
CPC分类号： G02B15/173
摘要： A zoom lens includes, from front to rear, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power and a fourth lens unit having a positive refractive power, at least the second and fourth lens units being moved to effect zooming, wherein the maximum image angle is increased while the diameter of the first lens unit is extremely reduced.

3. 发明授权

US5784205A Zoom lens 失效
标题翻译：变焦镜头
公开(公告)号：US5784205A
公开(公告)日：1998-07-21
申请号：US483850
申请日：1995-06-07
申请人： Hiroki Nakayama , Akihisa Horiuchi , Hitoshi Mukaiya , Yasunori Murata , Fumihito Wachi
发明人： Hiroki Nakayama , Akihisa Horiuchi , Hitoshi Mukaiya , Yasunori Murata , Fumihito Wachi
IPC分类号： G02B15/173 , G02B15/14
CPC分类号： G02B15/173
摘要： A zoom lens includes, from front to rear, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power and a fourth lens unit having a positive refractive power, at least the second and fourth lens units being moved to effect zooming, wherein the maximum image angle is increased while the diameter of the first lens unit is extremely reduced.
摘要翻译：变焦透镜从前到后具有正屈光力的第一透镜单元，具有负屈光力的第二透镜单元，具有正折光力的第三透镜单元和具有正折光力的第四透镜单元，至少第二和第四透镜单元被移动以实现变焦，其中最大图像角度增加，而第一透镜单元的直径极大地减小。

4. 发明授权

US5754346A Zoom lens 失效
标题翻译：变焦镜头
公开(公告)号：US5754346A
公开(公告)日：1998-05-19
申请号：US684726
申请日：1996-07-22
申请人： Hiroki Nakayama , Akihisa Horiuchi , Hitoshi Mukaiya , Yasunori Murata , Fumihito Wachi
发明人： Hiroki Nakayama , Akihisa Horiuchi , Hitoshi Mukaiya , Yasunori Murata , Fumihito Wachi
IPC分类号： G02B15/173 , G02B15/14
CPC分类号： G02B15/173
摘要： A zoom lens of the rear focus type including, from an object side to an image side, a first lens unit of positive refractive power, a second lens unit of negative refractive power, a third lens unit of positive refractive power having a stop, and a fourth lens unit of positive refractive power. During zooming from a wide-angle end to a telephoto end, the second lens unit is moved toward the image side, the third lens unit and the stop are moved in unison in a locus convex toward the object side, and the fourth lens unit is moved in a locus convex toward the object side. During focusing, the fourth lens unit is moved, and the following condition is satisfied: -0.3
摘要翻译：后焦点类型的变焦透镜包括从物体侧到像侧的正屈光力的第一透镜单元，负折光力的第二透镜单元，具有光阑的正屈光力的第三透镜单元，以及正屈光力的第四透镜单元。在从广角端到望远端的变焦期间，第二透镜单元朝向像侧移动，第三透镜单元和止挡在朝向物体侧凸出的轨迹中一致地移动，并且第四透镜单元在朝向物体侧凸出的轨迹中移动。在聚焦期间，移动第四透镜单元，并且满足以下条件：-0.3

5. 发明授权

US06308011B1 Zoom lens and photographic apparatus having the same 有权
标题翻译：具有相同的变焦镜头和拍摄装置
公开(公告)号：US06308011B1
公开(公告)日：2001-10-23
申请号：US09281270
申请日：1999-03-30
申请人： Fumihito Wachi , Kenichi Kimura
发明人： Fumihito Wachi , Kenichi Kimura
IPC分类号： G03B1700
CPC分类号： G02B15/177
摘要： A zoom lens, includes, in order from an object side to an image side, a first lens unit of negative refractive power, the first lens unit having an aspherical lens of negative refractive power, a stop, a second lens unit of positive refractive power, the second lens unit having an aspherical lens of positive refractive power, and a third lens unit of positive refractive power, wherein, during zooming from a wide-angle end to a telephoto end, the second lens unit and the stop move in unison toward the object side, and the first lens unit so moves as to compensate for a shift of an image plane resulting from the zooming.
摘要翻译：变焦透镜从物体侧到像侧依次包括负屈光力的第一透镜单元，第一透镜单元具有负折光力的非球面透镜，停止点，正屈光力的第二透镜单元所述第二透镜单元具有正折光力的非球面透镜，以及具有正折光力的第三透镜单元，其中，在从广角端到望远端的变焦期间，所述第二透镜单元和所述停止一致地向着物体侧和第一透镜单元移动以补偿由变焦产生的图像平面的偏移。

6. 发明授权

US06208472B1 Lens drive control device and image pickup apparatus having the same 失效
公开(公告)号：US06208472B1
公开(公告)日：2001-03-27
申请号：US09061432
申请日：1998-04-17
申请人： Fumihito Wachi
发明人： Fumihito Wachi
IPC分类号： G02B1514
CPC分类号： G02B7/102
摘要： A lens drive control device includes a zoom lens, a drive mechanism for driving at least one lens unit which constitutes the zoom lens, a control circuit for controlling the drive mechanism, and a switch for switching between a shooting state and a non-shooting state of the zoom lens, wherein, when the zoom lens is switched from the non-shooting state to the shooting state by the switch, the control circuit causes the drive mechanism to drive the zoom lens to a zoom position other than a wide-angle end.

7. 发明授权

US06639737B2 Zoom lens system and projection apparatus using the same 失效
公开(公告)号：US06639737B2
公开(公告)日：2003-10-28
申请号：US10028095
申请日：2001-10-25
申请人： Hiroto Yasui , Fumihito Wachi
发明人： Hiroto Yasui , Fumihito Wachi
IPC分类号： G02B962
CPC分类号： G02B15/177 , G02B13/16
摘要： A zoom lens system which allows a reduction in size. This zoom lens makes two points at different distances have an optically conjugate relationship, and sequentially includes, from a first conjugate point side at a longer distance to a second conjugate point side at a shorter distance, a first lens unit having a negative optical power, a second lens unit, a third lens unit, a fourth lens unit, a fifth lens unit, and a sixth lens unit. A plurality of lens units of the first to sixth lens units move for zooming, and at least one lens unit of the first to sixth lens units has a diffractive optical element.

8. 发明授权

US06271974B1 Lens drive control device and image pickup apparatus having the same 有权
公开(公告)号：US06271974B1
公开(公告)日：2001-08-07
申请号：US09749341
申请日：2000-12-27
申请人： Fumihito Wachi
发明人： Fumihito Wachi
IPC分类号： G02B1514
摘要： A lens drive control device includes a zoom lens, a drive mechanism for driving at least one lens unit which constitutes the zoom lens, a control circuit for controlling the drive mechanism, and a switch for switching between a shooting state and a non-shooting state of the zoom lens, wherein, when the zoom lens is switched from the non-shooting state to the shooting state by the switch, the control circuit causes the drive mechanism to drive the zoom lens to a zoom position other than a wide-angle end.

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