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1. 发明授权

US5969880A Zoom lens system 失效
标题翻译：变焦镜头系统
公开(公告)号：US5969880A
公开(公告)日：1999-10-19
申请号：US045110
申请日：1998-03-20
申请人： Sachio Hasushita , Takayuki Ito , Takashi Enomoto
发明人： Sachio Hasushita , Takayuki Ito , Takashi Enomoto
IPC分类号： G02B13/18 , G02B15/16 , G02B15/163 , G02B15/20 , G02B15/14
CPC分类号： G02B15/163
摘要： A zoom lens system comprising at least three lens groups including a positive first lens group, a positive second lens group having at least one negative lens element, and a third lens group having a negative focal length, wherein upon zooming from the shortest focal length toward the longest focal length, all the lens groups are moved toward the object side, and the distance between the first and second lens groups increases and the distance between the second and third lens groups decreases, and wherein the system satisfies the conditions (1) -0.3 0), f.sub.2G designates the focal length of the second lens group (f.sub.2G >0), f.sub.3G designates the focal length of the third lens group (f.sub.3G
摘要翻译：一种变焦透镜系统，包括至少三个透镜组，包括正的第一透镜组，具有至少一个负透镜元件的正的第二透镜组和具有负焦距的第三透镜组，其中，从最短焦距变焦到最长焦距，所有透镜组朝向物体侧移动，并且第一和第二透镜组之间的距离增加，并且第二和第三透镜组之间的距离减小，并且其中系统满足条件（1） - 0.3 0），f2G表示第二透镜组（f2G> 0）的焦距，f3G表示第三透镜组（f3G <0）的焦距，N2Gn表示所有负像素的平均折射率第二透镜的透镜元件g 。。

2. 发明授权

US5726799A Real image type viewfinder 失效
标题翻译：真实图像类型取景器
公开(公告)号：US5726799A
公开(公告)日：1998-03-10
申请号：US590559
申请日：1996-03-21
申请人： Tetsuya Abe , Sachio Hasushita , Takayuki Ito
发明人： Tetsuya Abe , Sachio Hasushita , Takayuki Ito
IPC分类号： G02B13/18 , G02B15/177 , G02B23/14 , G02B25/00 , G03B13/06 , G02B23/00
CPC分类号： G02B13/18 , G02B15/177 , G02B23/14 , G03B13/06 , G02B23/145
摘要： A image type viewfinder is provided with, in the following order from the object side: an objective lens group, a condenser lens group which transmits the image of the object formed by the objective lens group towards an eyepiece lens group, an image erecting optical system that erects an inverted image, and, the eyepiece lens group. The objective lens group consists of a first negative lens group and a second positive lens group, located in this order from the object side wherein first negative lens group and second positive lens group forming a movable variable focal length lens group. The first negative lens group comprises a double-aspheric lens which satisfies the following relationships: -0.5
摘要翻译：从物体侧按照以下顺序设置图像型取景器：物镜组，将由物镜组形成的物体的图像朝向目镜透镜组透射的聚光透镜组，图像立体光学系统竖立反转图像，以及目镜透镜组。物镜组由第一负透镜组和第二正透镜组构成，第一负透镜组和第二正透镜组从物体侧依次形成，其中第一负透镜组和第二正透镜组形成可移动可变焦距透镜组。第一负透镜组包括满足以下关系的双非球面透镜：-0.5

3. 发明授权

US5663838A Zoom lens system 失效
标题翻译：变焦镜头系统
公开(公告)号：US5663838A
公开(公告)日：1997-09-02
申请号：US523935
申请日：1995-09-06
申请人： Sachio Hasushita , Takayuki Ito
发明人： Sachio Hasushita , Takayuki Ito
IPC分类号： G02B13/18 , G02B15/16 , G02B15/14
CPC分类号： G02B15/161
摘要： A zoom lens system which includes a positive first lens group and a negative second lens group, arranged in this order from an object side so that a distance between the first and second lens groups is changed to alter the focal length. The first lens group includes a first negative sub-lens group, and a first positive sub-lens group. The first negative sub-lens group includes a first negative lens made of glass, and a second negative lens made of plastic. The first positive sub-lens group includes a positive third lens made of glass. The negative second lens group includes a positive fourth lens made of plastic, and a negative fifth lens made of glass lens, in this order from the object side. The zoom lens system satisfies the following relationships:SF1=(r.sub.1-1 +r.sub.1-2)/(r.sub.1-1 -r.sub.1-2).ltoreq.0;andSF2=(r.sub.2-1 +r.sub.2-2)/(r.sub.2-1 -r.sub.2-2)>0where SF1 designates the shaping factor of the first negative lens, SF2 the shaping factor of the second negative lens, and r.sub.1-j the radius of curvature of the j-th surface of the i-th lens, respectively.
摘要翻译：一种变焦透镜系统，包括从物体侧依次排列的正的第一透镜组和负的第二透镜组，使得第一和第二透镜组之间的距离被改变以改变焦距。第一透镜组包括第一负子透镜组和第一正子透镜组。第一负子透镜组包括由玻璃制成的第一负透镜和由塑料制成的第二负透镜。第一正子透镜组包括由玻璃制成的正第三透镜。负的第二透镜组从物体侧依次包括由塑料制成的正的第四透镜和由玻璃透镜制成的负的第五透镜。变焦透镜系统满足以下关系：SF1 =（r1-1 + r1-2）/（r1-1-r1-2） 0其中，SF1表示第一负透镜的整形系数，SF2表示第二负透镜的整形系数，r1-j表示第i透镜的第j表面的曲率半径，分别。

4. 发明授权

US5309278A Real-image variable magnification finder including a light shield between two moving lens groups 失效
标题翻译：包括两个移动透镜组之间的遮光罩的实像可变放大倍数
公开(公告)号：US5309278A
公开(公告)日：1994-05-03
申请号：US952806
申请日：1992-09-28
申请人： Takayuki Ito , Sachio Hasushita
发明人： Takayuki Ito , Sachio Hasushita
IPC分类号： G03B13/12 , G02B15/16 , G02B23/14 , G03B13/06 , G02B13/10 , G02B15/163
CPC分类号： G02B15/16 , G02B23/145
摘要： A real-image variable magnification finder is capable of blocking deleterious rays of light without increasing the lens diameter or the size of the erecting prism even of the view angle is large. The improved finder includes, in order from the object side, objective lens system II, condenser lens III with which the image of the object formed by the objective lens system II is directed to eyepiece lens system V, erecting prism system IV for inverting the image of the object, and eyepiece lens system V, and the objective lens system II comprises at least two zooming groups IIA and IIB that will move along the optical axis and light shielding means A that is provided between the zooming groups for blocking deleterious rays of light.
摘要翻译：即使视角较大，实像可变放大倍数取景器能够阻挡有害光线而不增加透镜直径或竖立棱镜的尺寸。改进的取景器从物体侧依次包括物镜系统II，由物镜系统II形成的物体的图像与其对应于目镜透镜系统V的聚光透镜III，竖立用于反转图像的棱镜系统IV 目镜和目镜系统V，并且物镜系统II包括将沿光轴移动的至少两个放大组IIA和IIB以及设置在缩放组之间用于阻挡有害光线的遮光装置A 。

5. 发明授权

US06169853A Zooming optical system 失效
标题翻译：缩放光学系统
公开(公告)号：US06169853A
公开(公告)日：2001-01-02
申请号：US09222916
申请日：1998-12-30
申请人： Sachio Hasushita , Takayuki Ito
发明人： Sachio Hasushita , Takayuki Ito
IPC分类号： G03B1700
CPC分类号： G02B27/646 , G02B15/173
摘要： A zooming optical system is provided with a plurality of lens groups that are moved to change a focal length of the zooming optical system. One of the plurality of lens groups including an aperture member has constituted to have (I) a focusing lens group that is driven to move for focusing, and (II) a image-vibration compensation lens group that is driven to move for compensating trembling of image due to a hand-vibration applied to the zooming optical system. The aperture member does not move when the focusing lens group or the image-vibration compensation lens group is driven to move.
摘要翻译：变焦光学系统设置有移动以改变变焦光学系统的焦距的多个透镜组。包括光圈构件的多个透镜组中的一个被构造成具有（I）被驱动以移动以进行聚焦的聚焦透镜组，以及（II）被驱动以移动以补偿颤抖的图像振动补偿透镜组由于施加到变焦光学系统的手抖动造成的图像。当聚焦透镜组或图像振动补偿透镜组被驱动移动时，光圈构件不移动。

6. 发明授权

US5793535A Zoom lens having high zoom ratio 失效
标题翻译：变焦镜头具有高变焦比
公开(公告)号：US5793535A
公开(公告)日：1998-08-11
申请号：US734267
申请日：1996-10-21
申请人： Takayuki Ito , Sachio Hasushita
发明人： Takayuki Ito , Sachio Hasushita
IPC分类号： G02B15/20 , G02B15/163 , G02B15/14 , G02B9/12
CPC分类号： G02B15/163
摘要： A zoom lens includes a positive first lens group, a positive second lens group, and a negative third lens group, in this order from the subject side. The first lens group consists of a negative first lens element, a positive second lens element and a positive third lens element in this order from the object side and satisfies the following relationships: 4.3
摘要翻译：变焦透镜从主体侧依次依次包括正的第一透镜组，正的第二透镜组和负的第三透镜组。第一透镜组从物体侧依次由负的第一透镜元件，正的第二透镜元件和正的第三透镜元件组成，并且满足以下关系：4.3

7. 发明授权

US5701205A Shiftable lens system 失效
标题翻译：可换镜头系统
公开(公告)号：US5701205A
公开(公告)日：1997-12-23
申请号：US414126
申请日：1995-03-30
申请人： Sachio Hasushita , Shuji Yoneyama , Koichi Maruyama , Takayuki Ito
发明人： Sachio Hasushita , Shuji Yoneyama , Koichi Maruyama , Takayuki Ito
IPC分类号： G02B13/00 , G02B15/04 , G02B27/64 , G03B5/00 , G02B15/14
CPC分类号： G02B15/04 , G02B13/00 , G02B27/646 , G03B5/00 , G03B2227/325
摘要： A shiftable lens system having front and rear lens groups, wherein a part or the whole of the rear lens group is shiftable in a direction perpendicular to the principal optical axis thereof.
摘要翻译：一种具有前透镜组和后透镜组的可移动透镜系统，其中后透镜组的一部分或全部可在垂直于其主光轴的方向上移动。

8. 发明授权

US5513043A Real image type variable power finder 失效
标题翻译：真实图像类型可变电源
公开(公告)号：US5513043A
公开(公告)日：1996-04-30
申请号：US383380
申请日：1995-02-03
申请人： Tetsuya Abe , Sachio Hasushita , Takayuki Ito
发明人： Tetsuya Abe , Sachio Hasushita , Takayuki Ito
IPC分类号： G02B15/177 , G02B23/14 , G03B13/12 , G02B15/14 , G02B23/00
CPC分类号： G02B15/177 , G03B13/12 , G02B23/145
摘要： A real image type variable power finder includes an objective lens system, an ocular lens system, a condenser lens, and an image erecting optical system. The objective lens system includes a first lens group having a negative power and a second lens group having a positive power in this order from the object side, so that the two lens groups being removed to vary the magnification. The second lens group has a negative lens and a positive lens in this order from the object side. The variable power finder satisfies the relationships:(1) 2.5
摘要翻译：实像图像可变功率寻像器包括物镜系统，目镜系统，聚光透镜和图像立体光学系统。物镜系统包括具有负功率的第一透镜组和从物体侧起依次具有正光焦度的第二透镜组，从而去除两个透镜组以改变放大率。第二透镜组从物体侧起依次具有负透镜和正透镜。可变功率寻找器满足以下关系：（1）2.5

9. 发明授权

US5410430A Variable power view finder 失效
标题翻译：可变电源查找器
公开(公告)号：US5410430A
公开(公告)日：1995-04-25
申请号：US981544
申请日：1992-11-25
申请人： Takayuki Ito , Sachio Hasushita
发明人： Takayuki Ito , Sachio Hasushita
IPC分类号： G02B15/177 , G02B23/14 , G02B13/18 , G02B13/02 , G02B15/14
CPC分类号： G02B23/14 , G02B15/177 , G02B23/145
摘要： A real image type of variable power view finder is disclosed which has an objective lens system, an image erecting optical system, and an eyepiece lens system, located in this order as viewed from an object to be photographed. The objective lens system includes negative and positive lens groups located in this order from the object side, so as to vary the distance therebetween, to change the magnification. The negative lens group of the objective lens system has at least two negative lenses.
摘要翻译：公开了一种具有物镜系统，图像立体光学系统和目镜透镜系统的实像图像可变能量取景器，该系统以从被拍摄物体观察的顺序设置。物镜系统包括从物体侧依次设置的负透镜组和正透镜组，以便改变它们之间的距离，以改变放大率。物镜系统的负透镜组具有至少两个负透镜。

10. 发明授权

US5353162A Zoom lens system 失效
标题翻译：变焦镜头系统
公开(公告)号：US5353162A
公开(公告)日：1994-10-04
申请号：US907791
申请日：1992-07-02
申请人： Takayuki Ito , Sachio Hasushita
发明人： Takayuki Ito , Sachio Hasushita
IPC分类号： G02B13/18 , G02B15/16 , G02B15/14
CPC分类号： G02B15/161
摘要： A zoom lens system having a zoom ratio of approximately 2 that is used with a compact camera. The system's overall lens length at the telephoto end is shorter than its focal length at the telephoto end, and it experiences small variations in aberrations during zooming. The present zoom lens system comprises, in order from the object side, a positive first lens group and a negative second lens group, which adjust the magnification by varying the distance therebetween. This lens system satisfies the following conditions:1.59
摘要翻译：具有与小型照相机一起使用的大约2的变焦比的变焦透镜系统。远摄端的系统整体透镜长度比望远端的焦距要短，而在变焦时它的像差变化很小。本变焦透镜系统从物体侧依次包括正的第一透镜组和负的第二透镜组，通过改变它们之间的距离来调整放大率。该透镜系统满足以下条件：1.59

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