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公开(公告)号：US4183636A
公开(公告)日：1980-01-15
申请号：US903541
申请日：1978-05-08
CPC分类号： G02B27/18
摘要： A projector for motion pictures or slides has a varifocal objective with a positive front component, an axially slidable negative intermediate component and a fixed positive rear lens group. The front component, or at least its foremost lens member, has a lens mount which is displaceable along a track substantially transverse to the optical axis; the track may be curved with its convex side facing the projection screen. A diaphragm just behind the front component has an aperture barely exceeding the diameter of the intermediate component whereas the front component (or its transversely displaceable part) is radially extended past the diaphragm aperture so as to register with it in every position.
摘要翻译： 用于运动图像或幻灯片的投影仪具有正偏转目标，具有正前部分，可轴向滑动的负中间分量和固定的正后透镜组。 前部部件或至少其最重要的透镜部件具有可沿着基本上横向于光轴的轨道移位的透镜座; 轨道可以以其凸面朝向投影屏幕而弯曲。 刚好在前部件后面的隔膜具有几乎不超过中间部件的直径的孔，而前部件（或其横向可移位部件）径向延伸超过隔膜孔径，以便在每个位置与其对准。
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公开(公告)号：US3989349A
公开(公告)日：1976-11-02
申请号：US439629
申请日：1974-02-04
CPC分类号： G02B13/00 , G02B25/001 , G03B19/12
摘要： A camera of the reflex type comprises a view finder with an achromatic finder objective, an eyepiece, and an interposed inverting lens group. The finder objective includes a negative-meniscus lens of relatively low Abbe number and a biconvex lens of relatively high Abbe number. The negative-meniscus lens, which has a concave forward surface, may be air-spaced from the biconvex lens or may be cemented thereto to form a doublet; in the latter instance the doublet is preceded by a positive, biconvex or planoconvex, front lens.
摘要翻译： 反射型摄像机包括具有消色差寻像器物镜的目镜，目镜和插入的反转镜头组的取景器。 取景器物镜包括相对较低的阿贝数的负弯月形透镜和相对高的阿贝数的双凸透镜。 具有凹形前表面的负弯月形透镜可以与双凸透镜间隔开，或者可以粘合到其上以形成双峰; 在后一种情况下，双面镜前面是正，双凸或平凸透镜。
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3.发明授权Basic lens assembly for series of zoom objectives of different varifocal ratios 失效基本镜头组件用于不同幅度比例的变焦目标系列
公开(公告)号：US4066340A
公开(公告)日：1978-01-03
申请号：US713224
申请日：1976-08-10
IPC分类号： G02B15/10 , G02B15/167 , G02B15/17 , G02B15/16 , G02B17/00
CPC分类号： G02B15/17
摘要： A zoom objective is disclosed which consists of a varifocal front lens group and a fixed rear lens group, the front lens group comprising a stationary first component of positive refractivity, axially shiftable second and third components of negative refractivity, and a stationary fourth component of positive refractivity separated from the rear lens group by a reflex prism adjoining a diaphragm space. The assembly of third and fourth components, prism and rear lens group can be selectively combined with various first and second components to provide zoom objectives of different varifocal ratios.
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公开(公告)号：US4094587A
公开(公告)日：1978-06-13
申请号：US713222
申请日：1976-08-10
IPC分类号： G02B15/10 , G02B15/14 , G02B15/177
CPC分类号： G02B15/177
摘要： A substantially afocal front attachment of variable magnification ratio, to be combined with a fixed-focus rear lens group in order to form a zoom objective, consists of two fixedly interconnected outer lens members and an axially shiftable biconvex intermediate lens member. The two outer lens members are negative menisci turning their convex sides toward the intermediate lens member. The objective has a varifocal ratio close to 2:1.
摘要翻译： 为了形成变焦目标而与固定焦距的后透镜组组合的可变放大率的基本无焦的前附件由两个固定地互连的外透镜构件和可轴向移动的双凸透镜构件组成。 两个外透镜构件是负半月形，使其凸侧朝向中间透镜构件。 目标变异率接近2：1。
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公开(公告)号：US3942874A
公开(公告)日：1976-03-09
申请号：US442433
申请日：1974-02-14
摘要： A pancratic wide-angle objective comprises a stationary negative front component in the form of a single meniscus with a convex forward surface, an axially movable intermediate component consisting of a biconvex lens, and a stationary multilens positive rear component separated from the front component by an airspace greater than the focal length of the latter. The individual focal lengths of the front, intermediate and rear components have absolute values in a ratio of approximately 4:5:3.
摘要翻译： 全景广角物镜包括具有凸形前表面的单个弯液面形式的固定的负前部部件，由双凸透镜组成的可轴向移动的中间部件和从前部部件分离的固定多重正面后部部件 空域大于后者的焦距。 前，后组分的各个焦距的绝对值约为4：5：3。
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公开(公告)号：US4261648A
公开(公告)日：1981-04-14
申请号：US911328
申请日：1978-06-01
IPC分类号： G02B15/167 , G02B15/173 , G02B15/16
CPC分类号： G02B15/173
摘要： An objective of the pancratic type includes a varifocal front lens group and a fixed-focus rear lens group, the latter consisting of five air-spaced singlets. The front lens group is constituted by a positive first component consisting of three singlets, an axially shiftable negative second component consisting of a singlet and a doublet, and an axially shiftable positive third component in the form of a nearly planoconvex singlet of low power.
摘要翻译： 泛化型的目的包括变焦焦点前透镜组和固定焦距后透镜组，后者由五个空气间隔单体组成。 前透镜组由由三个单体组成的正的第一分量，由单重和双峰构成的轴向可移动的负第二分量和低功率近似平凸单峰的轴向可移动的正的第三分量构成。
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公开(公告)号：US4118108A
公开(公告)日：1978-10-03
申请号：US713221
申请日：1976-08-10
申请人： Trude Muszumanski
发明人： Trude Muszumanski
IPC分类号： G02B15/14 , G02B15/173
CPC分类号： G02B15/173 , G02B15/14
摘要： A zoom objective with a varifocal ratio close to 2:1, particularly for a projector, has a stationary positive front component, a single axially shiftable negative lens and a stationary multilens rear component. An object-side positive lens member of the rear component, adjoining the shiftable negative lens, has a focal length smaller than that of the group constituted by the remaining, image-side lens members of this component. The negatively refracting third member of the rear component may be a doublet with a positively refracting cemented surface, convex toward the image side, or an equivalent lens pair separated by a small air gap.
摘要翻译： 具有接近2：1的变焦比的变焦目标，特别是对于投影仪，具有固定的正前部部件，单个可轴向移动的负透镜和固定的多重后部部件。 与可移动负透镜相邻的后部部件的物体侧正透镜部件的焦距小于由该部件的剩余的像侧透镜部件构成的组的焦距。 后部组件的负折射第三构件可以是具有正折射粘结表面，朝向图像侧凸起的双重形状或由小气隙分开的等效透镜对。
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公开(公告)号：US4087160A
公开(公告)日：1978-05-02
申请号：US747207
申请日：1976-12-03
IPC分类号： G02B15/167 , G02B15/17 , G02B15/18
CPC分类号： G02B15/17
摘要： A varifocal forward lens group of a camera objective, with a pair of axially shiftable negative components bracketed by a pair of substantially fixed positive components, has its negative third component more widely separated from its positive fourth component in a wide-angle position of minimum overall focal length than in a telephoto position of maximum overall focal length. The effective diameter of that third component is just large enough to let a bundle of axially incident light rays fully illuminate the fourth component in the wide-angle position, with less than full illumination in the telephoto position. The positive first component is also just large enough to provide full illumination of the effective area of the third component by axial rays in the telephoto position.
摘要翻译： 具有由一对基本上固定的正分量包围的一对可轴向移动的负面部件的相机物镜的变焦镜前方透镜组在其最小总宽度的广角位置中具有与其正的第四分量更广泛地分离的负第三分量 焦距比最大总焦距的远摄位置。 该第三部件的有效直径足够大以使一束轴向入射的光线在广角位置中完全照射第四部件，其中远摄位置处的全光线不足。 正的第一分量也足够大以通过远摄位置的轴向光线来提供第三分量的有效面积的完全照明。
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公开(公告)号：USRE29237E
公开(公告)日：1977-05-31
申请号：US642194
申请日：1975-12-18
申请人： Trude Muszumanski , Helmut Gela
发明人： Trude Muszumanski , Helmut Gela
IPC分类号： G02B15/163 , G02B15/173 , G03B17/14
CPC分类号： G02B15/173 , G02B15/163 , G03B17/14
摘要： A main lens unit having a fixed focal length and consisting of a positive lens member is preceded by an afocal forward lens unit having a variable magnification and consisting of a positive forward lens member, a negative intermediate lens member which is axially movable to change the magnification, and a positive rear lens member. The intermediate lens member is arranged to direct divergent bundles of rays to said rear lens member. The rear lens member is arranged to convert said divergent bundles or rays into bundles of rays which are substantially parallel to the optical axis of the lens and to direct them to said main lens unit. The forward lens member is axially movable to control the position of the image plane. The lens is designed to meet the conditionf.sub.min -f.sub.11
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公开(公告)号：US3937562A
公开(公告)日：1976-02-10
申请号：US406291
申请日：1973-10-15
IPC分类号： G02B15/163 , G02B15/173 , G02B15/00 , G02B9/60
CPC分类号： G02B15/173
摘要： A varifocal objective has an axially shiftable positive front component, an axially shiftable negative intermediate component, and a fixed positive rear component or basic lens group. The latter component consists of five closely spaced lens members, all but the second of them singlets and all but the third of them positively refracting. The intermediate component is separated from the rear component by a diaphragm space which in a position of close approach of these components, corresponding to maximum focal length, is still substantially greater than any air space between the lens members of the rear component. With a varifocal ratio close to 3:1, the distance between the front and rear components is the same in the positions of maximum and minimum focal lengths.
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