公开(公告)号：US4907865A

公开(公告)日：1990-03-13

申请号：US289269

申请日：1988-12-23

申请人： Aiko Ichiki ,  Nagayoshi Hirano

发明人： Aiko Ichiki ,  Nagayoshi Hirano

IPC分类号： G02B13/24 ,  G02B9/62 ,  G02B15/16 ,  G02B15/20

CPC分类号： G02B15/16 ,  G02B9/62

摘要： A variable scale duplicator lens system, including: front and rear lens group each consisting of three lenses and located on the opposite sides of a stop, the front group on the side of the subject and the rear group on the image-forming side; the front group on the subject side including a 1st lens consisting of a meniscus lens of positive power facing the convex side thereof toward the subject, a 2nd lens consisting of a meniscus lens having negative power facing the convex side thereof toward the subject, and a 3rd lens of positive power; the rear lens group including 4th to 6th lenses arranged symmetrically with the 1st to 3rd lenses of the front lens group, respectively. Of these six lens members, at least one of the 1st and 6th lenses is movable. When the lens system as a whole is shifted along the optical axis for magnification of copy scale, the lens position is adjusted at least by shifting the 6th lens toward the 5th lens or by shifting the 1st lens away from the 2nd lens in case of reduction of copy scale, and the lens position is adjusted at least by shifting the 1st lens toward the 2nd lens or by shifting the 6th lens away from the 5th lens in case of enlargement of copy scale.

摘要翻译： 一种可变比例的复印机透镜系统，包括：前后透镜组，每个由三个透镜组成，位于一个光阑的相对侧上，该被摄体侧的前面组和该成像侧的后面组; 主体侧的前组包括由面向其朝向对象的其凸面的正功率的弯月形透镜组成的第一透镜，由具有面向其朝向对象的凸侧的负功率的弯月透镜构成的第二透镜，以及 第三透镜的正电力; 后透镜组包括分别与前透镜组的第1至第3透镜对称配置的第4至第6透镜。 在这六个透镜构件中，第一和第六透镜中的至少一个是可移动的。 当整个透镜系统沿着光轴移动以便复印刻度放大时，透镜位置至少通过将第六透镜移向第五透镜来调节，或者在减少的情况下将第一透镜移离第二透镜 并且透镜位置至少通过将第一透镜朝向第二透镜移动或者在放大复印标尺的情况下将第六透镜移离第五透镜来调节。

公开(公告)号：US3951524A

公开(公告)日：1976-04-20

申请号：US545196

申请日：1975-01-29

申请人： Yoshikazu Doi ,  Nagayoshi Hirano

发明人： Yoshikazu Doi ,  Nagayoshi Hirano

IPC分类号： G02B9/60 ,  G02B13/24

CPC分类号： G02B9/60

摘要： A projection lens system comprises a positive meniscus lens G1 (as numbered consecutively from front to rear) convex to the front, a biconcave lens G2, a biconvex lens G3, a positive meniscus lens G4 convex to the front, and a biconcave lens G5. The projection lens system is designed to be well matched with the halogen lamp of cold mirror type in which the distance to the secondary focus is short by using a negative lens at the rear end thereof, making the Petzval sum small, locating the entrance pupil as near to the aperture as possible and shortening the back focal distance. The image surface is made flat and spherical aberration and astigmatism are well corrected. The high order comatic flares are markedly reduced and an image of high sharpness and contrast can be obtained thereby. Further, the radii of curvature of all the surfaces in the lens system are made not smaller than 0.68f so that the lenses can be manufactured at a low cost.

摘要翻译： 投影透镜系统包括：向前凸起的正弯月透镜G1（从前到后连续编号），双凸透镜G2，双凸透镜G3，向前凸起的正弯月透镜G4和双凹透镜G5。 投影透镜系统设计成与冷镜型卤素灯相匹配，其中通过在其后端使用负透镜使二次焦点的距离短，使得Petzval总和较小，将入射光瞳定位为 尽可能靠近光圈并缩短后焦距。 图像表面平坦，球面像差和散光得到很好的校正。 高阶喜剧耀斑显着减少，从而可以获得高清晰度和对比度的图像。 此外，透镜系统中的所有表面的曲率半径不小于0.68f，从而可以以低成本制造透镜。

公开(公告)号：US4953958A

公开(公告)日：1990-09-04

申请号：US289379

申请日：1988-12-23

申请人： Toshiaki Katsuma ,  Nagayoshi Hirano

发明人： Toshiaki Katsuma ,  Nagayoshi Hirano

IPC分类号： G02B13/24 ,  G02B15/16

CPC分类号： G02B15/161

摘要： Described herein is a variable magnification duplicator lens system which is provided with, on the subject side of a stop, a front lens group including a 1st lens element consisting of a meniscus lens of positive power and facing the convex side thereof toward the subject, a 2nd lens element consisting of a meniscus lens of negative power facing the convex side thereof toward the subject, a 3rd lens element with positive power, and a 4th lens element with negative power, and on the image-forming side of the stop, a rear lens group including 5th, 6th, 7th, and 8th lens elements arranged symmetrically with the 1st to 4th lens elements of the front lens group, respectively. Of these lens elements, the 3rd to 6th lens elements and at least one of the 1st and 8th lens elements are movable. When shifting the whole lens system in the direction of the optical axis to vary the duplication scale, a reduced scale position is assumed by a lens position adjustment shifting the 5th and 6th lens elements into positions closer to the stop while at least shifting the 8th lens element toward the 7th lens element or shifting the 1st lens element away from the 2nd lens element, and an enlarged scale position is assumed by a lens position adjustment shifting the 3rd and 4th lens elements closer to the stop while at least shifting the 1st lens element toward the 2nd lens element or shifting the 8th lens elements away from the 7th lens element.

摘要翻译： 这里描述的是可变倍率复制透镜系统，其在停止的对象侧设置有包括正功率的弯月形透镜并且朝向被摄体的凸面侧的第一透镜元件的前透镜组， 第二透镜元件包括面向其朝向被摄体的凸面的负光焦度透镜，具有正光焦度的第三透镜元件和具有负光焦度的第四透镜元件，并且在该光阑的图像形成侧上， 透镜组包括分别与前透镜组的第1至第4透镜元件对称布置的第5,6s，第8和第八透镜元件。 在这些透镜元件中，第3至第6透镜元件和第1和第8透镜元件中的至少一个是可移动的。 当沿着光轴的方向移动整个透镜系统以改变复制刻度时，通过透镜位置调整来假定减小的刻度位置，将第5和第6透镜元件移动到更接近于停止的位置，同时至少使第8透镜 元件朝向第七透镜元件移动或将第一透镜元件移离第二透镜元件，并且通过透镜位置调整来假定放大的刻度位置，以使第三和第四透镜元件更靠近止动件，同时至少将第一透镜元件 朝向第二透镜元件或将第八透镜元件移离第七透镜元件。

公开(公告)号：US4514049A

公开(公告)日：1985-04-30

申请号：US513684

申请日：1983-07-14

申请人： Nagayoshi Hirano

发明人： Nagayoshi Hirano

IPC分类号： G02B13/24 ,  G02B15/16 ,  G02B15/177 ,  G02B15/20 ,  G02B17/00

CPC分类号： G02B15/177 ,  G02B13/24 ,  G02B15/16

摘要： A zoom lens system for use as a copying lens, for example, comprises first to sixth elements arranged in this order from front to rear with a stop disposed between the third and fourth elements. The first element is a positive lens convex to the front and the second element is a negative lens concave to the front. The first and second elements together form a first stationary lens group having negative power. The third element is a positive lens and forms a first movable lens. The sixth, fifth and fourth elements are reverse duplicates of the first, second and third elements. The fourth element forms a second movable lens, and the fifth and sixth elements together form a second stationary lens group. The lens system is axially movable as a unit between fixed image and object planes. The first and second movable lenses are axially movable in response to the axial movement of the entire lens system to vary the magnification of the image. The following three conditions are satisfied.0.4

摘要翻译： 例如，用作复印透镜的变焦透镜系统包括从前到后依次布置的第一至第六元件，设置在第三和第四元件之间的止动件。 第一元件是向前凸起的正透镜，第二元件是向前凹入的负透镜。 第一和第二元件一起形成具有负功率的第一固定透镜组。 第三元件是正透镜并形成第一可移动透镜。 第六，第五和第四元件是第一，第二和第三元件的反向重复。 第四元件形成第二可移动透镜，第五和第六元件一起形成第二固定透镜组。 透镜系统可以作为固定图像和物体平面之间的单元轴向移动。 响应于整个透镜系统的轴向移动，第一和第二可移动透镜可轴向移动，以改变图像的放大率。 满足以下三个条件。 0.4

公开(公告)号：US5526082A

公开(公告)日：1996-06-11

申请号：US324649

申请日：1994-10-18

申请人： Nagayoshi Hirano

发明人： Nagayoshi Hirano

IPC分类号： G03B13/06 ,  G02B7/32 ,  G03B13/02 ,  G03B13/16 ,  G03B13/20

CPC分类号： G03B13/02 ,  G02B7/32 ,  G03B13/20 ,  G03B2213/025

摘要： An automatic visibility regulator for a camera viewfinder includes a focusing detector system that is adapted to detecting whether or not an object image to be photographed, having passed through the viewfinder, is focused on the retina of the user's eyeball and a focal position shifting device adapted to shifting a focal position of an ocular system and thereby to shift a position at which the object image is focused. The focal position shifting device is actuated to shift the ocular system when the focusing detector system detects that the object image is not focused on the retina of the user's eyeball. The focal position shifting device is not actuated, and, consequently, the focal position of the ocular system is not changed, when the focusing detector system detects that the object image is focused on the retina. The focusing detector system includes a combination of a photo projector and a photodetector, wherein a beam of light projected from the projector passes through the ocular system and is reflected on the retina of the user's eyeball. The beam of light passes again through the ocular system and is received by the photodetector. Properties of the received beam of light determine whether or not the object image is focused on the retina. If it is determined that the object image is not focused on the retina, the focal position shifting device is actuated to shift the focal position of the ocular system until the object image is focused on the retina. In this manner, visibility is automatically adjusted to an appropriate value without any adjustment operation by user.

摘要翻译： 用于相机取景器的自动可见度调节器包括聚焦检测器系统，其适于检测已经通过取景器拍摄的被摄体的图像是否聚焦在用户的眼球的视网膜上，以及适配的焦点位置移动装置 以移动目镜系统的焦点位置，从而移动对象图像聚焦的位置。 当聚焦检测器系统检测到对象图像没有聚焦在用户的眼球的视网膜上时，致动焦点位置移动装置以移动眼睛系统。 当聚焦检测器系统检测到对象图像聚焦在视网膜上时，焦点位置移动装置未被致动，因此眼睛系统的焦点位置不改变。 聚焦检测器系统包括光电投影仪和光电检测器的组合，其中从投影仪投射的光束通过目镜系统并被反射在用户的眼球的视网膜上。 光束再次通过眼睛系统并被光电检测器接收。 接收光束的属性决定对象图像是否聚焦在视网膜上。 如果确定对象图像没有聚焦在视网膜上，则启动焦点位置移动装置以移动目镜系统的焦点位置，直到对象图像聚焦在视网膜上。 以这种方式，可视性被自动调整到适当的值，而不需要用户的任何调整操作。

公开(公告)号：US4149774A

公开(公告)日：1979-04-17

申请号：US851403

申请日：1977-11-14

申请人： Nagayoshi Hirano ,  Yasuo Honda ,  Yoshikazu Doi

发明人： Nagayoshi Hirano ,  Yasuo Honda ,  Yoshikazu Doi

IPC分类号： G02B13/24 ,  G02B15/16

CPC分类号： G02B13/24 ,  G02B15/16

摘要： A zoom lens system in accordance with this invention is composed of a first fixed lens group, a first movable lens group, a second movable lens group and a second fixed lens group arranged in this order from front to rear, wherein a stop is are located at the center of the whole lens system and the first fixed lens group and the second fixed lens group consist of the same lens elements and located symmetrically with respect to the stop, and similarly the first movable lens group and the second movable lens group consist of the same lens elements and are located symmetrically with respect to the stop. The first movable lens and the second movable lens are asymmetrically moved with respect to the stop in accordance with the location of the whole lens system that is changed to vary the magnification, whereby the distortion and the focus shift caused by the field curvature fluctuation are eliminated throughout the variable range of magnification. Further, the zoom lens system in accordance with this invention is characterized in that the power of the lens groups and the lens elements is designed to make the whole lens system compact in size.

摘要翻译： 根据本发明的变焦透镜系统由从前到后依次布置的第一固定透镜组，第一可移动透镜组，第二可移动透镜组和第二固定透镜组组成，其中定位 在整个透镜系统的中心处，第一固定透镜组和第二固定透镜组由相同的透镜元件组成并且相对于光阑对称设置，并且类似地，第一可移动透镜组和第二可移动透镜组由 相同的透镜元件并且相对于止挡件对称地定位。 根据改变倍率的整个透镜系统的位置，第一可移动透镜和第二可移动透镜相对于光阑不对称地移动，从而消除由场曲率波动引起的失真和聚焦偏移 在整个可变放大倍数范围内。 此外，根据本发明的变焦透镜系统的特征在于，透镜组和透镜元件的功率被设计成使得整个透镜系统的尺寸紧凑。