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公开(公告)号：US4705363A
公开(公告)日：1987-11-10
申请号：US675338
申请日：1984-11-27
申请人： Keiji Ikemori
发明人： Keiji Ikemori
IPC分类号： G02B15/177 , G02B15/14
CPC分类号： G02B15/177
摘要： An aberrational deterioration preventing zoom lens comprising a lens group axially movable for zooming, another lens group axially movable for zooming which has a plurality of lens units, an aperture diaphragm on the object side of the rear lens unit having an opening the size of which is variable to determine the F-number of the entire system, and an optical stop lying on the image side of the rear lens unit which positions an intersection P at which a marginal ray of the on-axial pencil corresponding to the full aperture and an upper marginal ray of the off-axial light pencil going to the margin Q of an image plane intersect each other, to restrict the on-axial light flux.
摘要翻译： 一种像差劣化防止变焦透镜，包括可轴向移动的变焦镜头组，另一透镜组可轴向移动以进行变焦，其具有多个透镜单元，后透镜单元的物体侧的孔径光阑具有开口大小为 变量以确定整个系统的F数，以及位于后透镜单元的图像侧的光学停止件，其位于与该全孔径相对应的轴上铅笔的边缘射线与上侧 到达图像平面的边缘Q的偏轴光笔的边缘线彼此相交，以限制轴向光通量。
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公开(公告)号：US4427268A
公开(公告)日：1984-01-24
申请号：US166798
申请日：1980-07-08
申请人： Keiji Ikemori
发明人： Keiji Ikemori
CPC分类号： G02B15/02 , G02B23/145
摘要： Disclosed is a view finder for a reflex camera, so designed that the view finder is provided with an objective lens group L1, the fixed lens group L2 and the eye piece lens L3 in sequence, whereby the distance between the front lens group and the fixed lens group is constant and there is provided a first dismountable attachment lens in front of the objective lens group and a second dismountable attachment lens at the back of the objective lens group. The sign of the refractive power of the first and the second attachment lens is inverse to that of the objective lens group. The first attachment lens and the objective lens group and the objective lens group and the second attachment lens respectively form a substantial afocal lens system.
摘要翻译： 公开了一种反光照相机的取景器，其设计使得取景器依次设置有物镜组L1，固定透镜组L2和眼镜透镜L3，由此前透镜组和固定透镜组之间的距离 透镜组是恒定的，并且在物镜组的前面设置有第一可拆卸的附接透镜和在物镜组背面的第二可拆卸附件透镜。 第一和第二附加透镜的屈光力的符号与物镜组的折射力相反。 第一附加透镜和物镜组以及物镜组和第二附加透镜分别形成实质上无焦点透镜系统。
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公开(公告)号：US4376571A
公开(公告)日：1983-03-15
申请号：US269902
申请日：1981-06-03
申请人： Keiji Ikemori
发明人： Keiji Ikemori
摘要： A photographic small size objective of the modified Gauss type which is well corrected for high grade imaging performance. The objective comprises, from front to rear, a first lens in a meniscus form of positive power with its convex curvature toward the front, a second lens in a similar form, a third lens in a meniscus form of negative power with its convex curvature toward the front, a fourth lens in a meniscus form of negative power with its convex curvature toward the rear, and a fifth lens of positive power with its rear surface having a strong refractive power.
摘要翻译： 改进高斯型的照相小尺寸物镜，对于高等级成像性能进行了良好的校正。 该目的包括从前到后的第一透镜，其以弯曲面形式具有朝向前方的凸曲率的正功率，具有相似形式的第二透镜，具有负光焦度的弯月形状的第三透镜，其凸曲率朝向 前部，具有朝向后方的凸曲率的负力的弯月形状的第四透镜和其后表面具有强屈光力的正功率的第五透镜。
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公开(公告)号：US4370031A
公开(公告)日：1983-01-25
申请号：US169721
申请日：1980-07-17
申请人： Keiji Ikemori
发明人： Keiji Ikemori
IPC分类号： G02B13/04 , G02B15/14 , G02B15/16 , G02B15/177
CPC分类号： G02B15/14 , G02B15/177
摘要： In the disclosed zoom objective the spacing between divergent front and convergent rear lens groups is varied for zooming. From front to rear, the divergent group consists of a negative meniscus lens of forward convexity, a bi-concave lens and a positive meniscus lens of forward convexity, the bi-concave and positive meniscus lenses defining an air lens which has a converging effect. From front to rear, the convergent group consists of a positive lens with its front surface of strong curvature, two positive meniscus lenses of forward convexity, a negative lens and a positive lens. The zoom objective satisfies the following conditions: ##EQU1## (3) .nu.3
摘要翻译： 在所公开的变焦目标中，发散前部和会聚后透镜组之间的间距是变化的用于变焦。 从前到后，发散组由正向凸起的负弯月形透镜，双凹透镜和正向凸起的正弯月透镜组成，双凹正阳半月形透镜限定具有会聚效应的空气透镜。 从前到后，收敛组由正曲面的前表面呈强曲率的正透镜，前凸的两个正弯月透镜，负透镜和正透镜组成。 缩放目标满足以下条件：
（1） （2）（3）nu 3 <35（4）32 <（nu 1或nu 2）<45.5 （5） 发散透镜组的焦距; Ft是整个系统中最长的焦距; Et是在长焦端发散集合组的主点之间的间隔; nu 1，nu 2和nu 3分别是发散透镜组中第1至第3透镜的阿贝数; N4，N5和N6是在会聚透镜组中从前面计数的第1至第3正透镜的折射率。 -
公开(公告)号：US4364644A
公开(公告)日：1982-12-21
申请号：US209493
申请日：1980-11-24
申请人： Keiji Ikemori
发明人： Keiji Ikemori
摘要： In the device disclosed, eight elements form a Gauss type wide or large aperture objective. The first element counting from the front is a positive meniscus lens of forward convexity, the second is a positive lens of convex curvature toward the front, the third is cemented to the second and is a negative lens of concave curvature toward the rear, the fourth is a negative lens of concave curvature toward the front, the fifth is cemented to the fourth and is a positive lens of convex curvature toward the rear, the sixth is a positive meniscus lens of rearward convexity, the seventh is a bi-convex lens with the rear surface of stronger curvature, and the eighth is a positive lens. The front surface of the second lens is aspherical so that as the distance from the optical axis increases, the deviation of the surface from the spherical surface of paraxial radius increases in a direction toward the front.
摘要翻译： 在所公开的器件中，八个元件形成高斯型宽或大孔径物镜。 从前面计数的第一个元件是正向凸起的正弯月形透镜，第二个是朝向前部的凸曲率的正透镜，第三个被固定到第二个，并且是向后的凹曲面的负透镜，第四个 是朝向前方的凹曲面的负透镜，第五个胶合到第四个并且是朝向后方的凸曲率的正透镜，第六个是向后凸的正弯月形透镜，第七个是具有 后表面更强的曲率，而第八个是正透镜。 第二透镜的前表面是非球面的，使得当距离光轴的距离增加时，表面与近轴半径的球面的偏差在朝向前方的方向上增加。
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公开(公告)号：US4329022A
公开(公告)日：1982-05-11
申请号：US147298
申请日：1980-05-06
申请人： Shin Yamaguchi , Akira Tajima , Keiji Ikemori
发明人： Shin Yamaguchi , Akira Tajima , Keiji Ikemori
IPC分类号： G02B13/04 , G02B15/16 , G02B15/177 , G02B15/14
CPC分类号： G02B15/177
摘要： The disclosed two-group wide-image-angle zoom lens is zoomed by changing the distance between the front and the rear group. The front group exhibits a negative refracting power and includes a first positive lens, a second negative lens concave toward the image end, a third positive lens, a fourth negative lens concave toward the image end, and a fifth positive image lens convex toward the object end, all in sequence; the rear group is closer to the image end than the front group, exhibits a positive refracting power, and includes a first positive sub-group, a second positive sub-group, a third negative sub-group, and a fourth positive sub-group.
摘要翻译： 通过改变前组和后组之间的距离来缩放所公开的两组宽图像角度变焦镜头。 前组具有负折射率，并且包括第一正透镜，朝向图像端凹入的第二负透镜，第三正透镜，朝向图像端凹入的第四负透镜，朝向物体凸起的第五正透镜 结束，全部顺序; 后组比前组更靠近图像端，呈现正折射率，并且包括第一正子组，第二正子组，第三负子组和第四正子组 。
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公开(公告)号：US5305148A
公开(公告)日：1994-04-19
申请号：US3668
申请日：1993-01-12
申请人： Keiji Ikemori , Kouji Oizumi , Yoshinori Itoh
发明人： Keiji Ikemori , Kouji Oizumi , Yoshinori Itoh
CPC分类号： G02B9/12 , G02B15/177
摘要： A varifocal lens is disclosed, comprising, from front to rear, a first lens unit of negative power, a second lens unit of positive power, and a third lens unit of negative power, all these lenses being moved along a common optical axis when the focal length of the entire lens system varies, wherein all the lens units each are constructed with either one lens, or two lenses, the total number of lenses being limited to 3 or 4, while still maintaining good optical performance.
摘要翻译： 公开了一种变焦透镜，包括从前到后的负功率的第一透镜单元，正光焦度的第二透镜单元和负光焦度的第三透镜单元，当所述透镜沿着共同的光轴移动时， 整个透镜系统的焦距变化，其中所有透镜单元均由一个透镜或两个透镜构成，透镜的总数被限制为3或4，同时仍然保持良好的光学性能。
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公开(公告)号：US5289317A
公开(公告)日：1994-02-22
申请号：US63041
申请日：1993-05-19
申请人： Keiji Ikemori , Koutaro Yano , Hiroki Nakayama
发明人： Keiji Ikemori , Koutaro Yano , Hiroki Nakayama
IPC分类号： G02B15/177 , G02B15/14
CPC分类号： G02B15/177
摘要： A zoom lens comprising, from front to rear, a first lens group of negative power, a second lens group of positive power and a third lens group of negative power, wherein as zooming from the wide-angle end to the telephoto end is performed by moving the first, second and third lens groups, the second and third lens groups both are directed forward and the speed of movement of the third lens group is faster than that of movement of the second lens group, the zoom lens satisfying the following conditions:1
摘要翻译： 一种变焦透镜，包括从前到后具有负功率的第一透镜组，正光焦度的第二透镜组和负光焦度的第三透镜组，其中，从广角端到望远端的变焦由 移动第一，第二和第三透镜组时，第二透镜组和第三透镜组都向前指向，并且第三透镜组的移动速度比第二透镜组的移动速度快，该变焦透镜满足以下条件： 1
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公开(公告)号：US5173805A
公开(公告)日：1992-12-22
申请号：US580357
申请日：1990-09-10
申请人： Kazuo Tanaka , Keiji Ikemori , Masatake Kato
发明人： Kazuo Tanaka , Keiji Ikemori , Masatake Kato
CPC分类号： G02B15/16
摘要： In the disclosed zoom lens three or more zoom components are located on the image side of a stationary component which is stationary during both focusing and zooming. The three or more zoom components are moved during zooming and are provided into a front portion which is moved for focusing, and a rear portion which remains stationary during focusing. The front focusing portion includes at least two components which move together when focusing, but when zooming move relative to each other so as to change the focal length or power of the front portion. This has the advantageous effect of reducing the difference between the amount the front portion needs to move for focusing at the wide angle position and at telephoto position.
摘要翻译： 在所公开的变焦镜头中，三个或更多个变焦部件位于在聚焦和变焦期间都是静止的静止部件的图像侧。 三个或更多个变焦分量在变焦期间被移动，并且被提供到前进部分，该前部部分被移动用于聚焦，以及后部部分在聚焦期间保持静止。 前聚焦部分包括至少两个在聚焦时一起移动的部件，但是当变焦相对于彼此移动时，以改变前部的焦距或功率。 这具有减小前部需要移动用于在广角位置和远摄位置处聚焦的量之间的差异的有利效果。
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公开(公告)号：US4826301A
公开(公告)日：1989-05-02
申请号：US926648
申请日：1986-11-03
申请人： Keiji Ikemori
发明人： Keiji Ikemori
摘要： A photographic objective having a soft focus function comprising, from front to rear, a first lens component of positive power, a second lens component having a meniscus-shaped lens of forward convexity, an aperture stop, and a third lens component, the second lens component being axially movable for the purpose of producing a soft focus effect, and a technique of compensating for the image shift resulting from the movement of the soft focus-introducing lens component by automatically readjusting the position of the focusing lens component, are disclosed.
摘要翻译： 具有软焦点功能的照相物镜包括从前到后的正功率的第一透镜部件，具有前凸的弯月面透镜的第二透镜部件，孔径光阑和第三透镜部件，第二透镜 公开了用于产生软焦点效果的轴向可移动部件，以及通过自动重新调整聚焦透镜部件的位置来补偿由于通过软焦点引入透镜部件的移动而产生的图像偏移的技术。
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