公开(公告)号：US4214814A

公开(公告)日：1980-07-29

申请号：US884357

申请日：1978-03-07

申请人： Shuji Ogino ,  Toshinobu Ogura ,  Yukio Okano ,  Akiyoshi Nakamura

发明人： Shuji Ogino ,  Toshinobu Ogura ,  Yukio Okano ,  Akiyoshi Nakamura

IPC分类号： G02B9/60 ,  G02B9/64 ,  G02B13/20

CPC分类号： G02B13/20

摘要： A variable soft focus lens system particularly adapted for photography is disclosed. The lens system incorporates two lens groups, a first object side lens group having an image side, rearmost surface convex to the image side, and a second, image side lens group having an object side, foremost surface concave to the object side. An airspace separating the first and second lens group has a meniscus shape concave to the object side. A good quality soft tone image having undersirable aberrations well within tolerable limits, is attained by shifting at least the second lens group along the optical axis relative to the first lens group whereby the airspace separating the two lens groups and a spherical aberration of the entire lens system is varied. An image does not lose proper focus while the spherical aberration of the system is varied. The second lens group has a refractive power within specified limits in relation to the refractive power of the entire lens system.

摘要翻译： 公开了一种特别适用于摄影的可变柔焦镜头系统。 透镜系统包括两个透镜组，具有图像侧的第一物体侧透镜组，朝向像侧凸起的最后表面，以及具有物体侧的第二镜像侧透镜组，最前端面朝向物体侧凹陷。 分离第一透镜组和第二透镜组的空间具有朝向物体侧凹入的弯月形状。 通过使第二透镜组相对于第一透镜组沿着光轴移动至少使第二透镜组分离两个透镜组的空间和整个透镜的球面像差，可获得具有良好的可容忍极限内的不良像差的良好质量的柔和色调图像 系统是多样的。 当系统的球面像差变化时，图像不会失去适当的对焦。 第二透镜组的折射力相对于整个透镜系统的屈光力具有特定的限制。

公开(公告)号：US4193667A

公开(公告)日：1980-03-18

申请号：US937276

申请日：1978-08-28

申请人： Mitsuo Yasukuni ,  Toshinobu Ogura ,  Takanobu Omaki ,  Masahide Tanaka

发明人： Mitsuo Yasukuni ,  Toshinobu Ogura ,  Takanobu Omaki ,  Masahide Tanaka

IPC分类号： G02B7/10 ,  G02B15/16 ,  G02B15/167 ,  G02B15/17 ,  G02B15/22

CPC分类号： G02B15/17

摘要： A constant magnification zoom lens system is provided that has the capability of permitting a predetermined desired constant magnification of an image during a zoom operation. A variator lens group for varying the focal length of the lens system and a compensator lens group for controlling the position of an image formed by the lens system is provided. Pairs of cam and follower assemblies can be provided in the barrel mechanism to control the movement of the respective compensator lens group and variator lens group so that the position of an image of a fixed object is maintained within a predetermined depth of focus in a normal zooming mode of operation and also the position of an image of a moving object can be maintained within a predetermined depth of focus in response to any variation of focal length to provide a constant magnification photography mode.

摘要翻译： 提供了一种恒定倍率变焦透镜系统，其具有在变焦操作期间允许图像的预定期望恒定倍率的能力。 提供了用于改变透镜系统的焦距的变焦透镜组和用于控制由透镜系统形成的图像的位置的补偿透镜组。 可以在镜筒机构中设置一对凸轮和跟随器组件，以控制各个补偿透镜组和变倍透镜组的运动，使得固定对象的图像的位置在正常变焦中保持在预定的焦深范围内 响应于焦距的任何变化，操作模式以及运动物体的图像的位置可以保持在预定的焦深范围内，以提供恒定的倍率拍摄模式。

公开(公告)号：US3973832A

公开(公告)日：1976-08-10

申请号：US436763

申请日：1974-01-25

申请人： Toshinobu Ogura ,  Akiyoshi Nakamura

发明人： Toshinobu Ogura ,  Akiyoshi Nakamura

IPC分类号： G02B9/64 ,  G02B13/00 ,  G02B13/04 ,  G02B9/62

CPC分类号： G02B13/04 ,  G02B13/00

摘要： A retro-focus type wide angle lens system comprises a negative first component located on the object side and including at least one negative meniscus lens; a positive intermediate second component consisting of one or two lens groups including at least one biconvex lens group and a rear third component which includes of four consecutive lenses including, in order, a positive meniscus first lens having a rear convex surface, a biconcave second lens, a positive meniscus third lens having a rear convex surface and a fourth positive lens; whereby the back focus of the total lens system is longer than the focal length, and satisfying the following conditions:(1)d.sub.c0 > d.sub.c2(2).vertline.r.sub.c2 .vertline..gtoreq. .vertline. r.sub.c3 .vertline.(3)V.sub.c1 > V.sub.c2(4)d.sub.c0 > d.sub.c4whereinr.sub.c2 and r.sub.c3 are the radius of curvature of the rear surface of the first lens of the third component and the radius of curvature of the front surface of the second lens of the third component, respectively; d.sub.c0 is the axial distance between the rear lens of the second component and the first lens of the third component; d.sub.c2 and d.sub.c4 are the axial distance between the first and second lenses of the third component and the axial distance between the second lens and the third lens; andV.sub.c1 and V.sub.c2 are Abbe's Numbers of the first and second lenses of the third component.

摘要翻译： 复焦型广角镜头系统包括位于物体侧并且包括至少一个负弯月形透镜的负第一部件; 由包括至少一个双凸透镜组的一个或两个透镜组和包括四个连续透镜的后部第三部件组成的正中间第二部件依次包括具有后凸表面的正弯月面第一透镜，双凹面第二透镜 具有后凸表面的正弯月面第三透镜和第四正透镜; 由此，全透镜系统的后焦距比焦距长，满足以下条件：

公开(公告)号：US4124276A

公开(公告)日：1978-11-07

申请号：US750824

申请日：1976-12-15

申请人： Yukio Okano ,  Akiyoshi Nakamura ,  Toshinobu Ogura

发明人： Yukio Okano ,  Akiyoshi Nakamura ,  Toshinobu Ogura

IPC分类号： G02B13/20

CPC分类号： G02B13/20

摘要： A variable soft focus lens system particularly adapted for photography is provided. The soft focus lens system includes at least two lens groups defining a meniscus shaped air space there between. The relative width of the air space can be variable by movement of one of the lens groups relative to the other. This movement can introduce a controlled amount of spherical aberration to provide within certain parameters a soft focus image with an acceptable Petzval sum and flatness of the image plane. Various embodiments of the present invention within the inventive parameters can be utilized and include both stationary and variable soft focus lens system.

摘要翻译： 提供了一种特别适用于摄影的可变柔焦镜头系统。 软焦点透镜系统包括至少两个在其间限定弯液面形空间的透镜组。 空间的相对宽度可以通过一个透镜组相对于另一透镜组的运动而变化。 该运动可以引入受控量的球面像差，以在某些参数内提供具有可接受的Petzval和图像平面度的柔焦图像。 本发明的各种实施例可以利用本发明的参数，包括静态和可变的柔焦镜头系统。

公开(公告)号：US3936153A

公开(公告)日：1976-02-03

申请号：US450249

申请日：1974-03-11

申请人： Toshinobu Ogura

发明人： Toshinobu Ogura

IPC分类号： G02B13/04 ,  G02B13/00 ,  G02B9/60

CPC分类号： G02B13/00

摘要： A retrofocus type objective lens system consists of five lenses, from the object side, a front first lens, a biconvex second lens, a biconcave third lens, a positive meniscus fourth lens having a rear convex surface, and a positive fifth lens, the system satisfying the following conditions:a. d.sub.4 > d.sub.5 + d.sub.6 + d.sub.7 + d.sub.8 + d.sub.9b. 0.7d.sub.4 0.2fWherein r.sub.j is the radius of curvature of the jth lens surface, designated sequentially from the object side: d.sub.j is the axial distance between the jth and the j+1 lens surfaces; N.sub.i is the refractive index of the ith lens; and f is the focal length of the entire lens system.

摘要翻译： 反射型物镜系统由物体侧的五个透镜组成，前第一透镜，双凸透镜第二透镜，双凹面第三透镜，具有后凸面的正弯月面透镜和正五面透镜，该系统 满足以下条件：a。 d4> d5 + d6 + d7 + d8 + d9 b。 0.7d4 0。

公开(公告)号：US4346966A

公开(公告)日：1982-08-31

申请号：US167119

申请日：1980-07-09

申请人： Akiyoshi Nakamura ,  Toshinobu Ogura ,  Masahide Tanaka

发明人： Akiyoshi Nakamura ,  Toshinobu Ogura ,  Masahide Tanaka

IPC分类号： G02B13/04 ,  G02B9/64 ,  G02B13/00

CPC分类号： G02B13/00 ,  G02B9/64

摘要： The present invention is directed to a compact lens system equally operable in both air and water, comprising a first lens group having a front surface directly facing the air or water medium, the center of the curvature of the front surface being located approximately at the entrance pupil of the lens system, and a second lens group located at the image side of the first lens group with an air space formed between the first and second lens groups. The air space and design parameters being selected in the lens system so that the field curvature of the lens system is mainly changed without any substantial change in other aberrations when the air space is changed, wherein the air space is changeable by a predetermined value in response to the change between use in air and use under water for maintaining a relatively flat image surface.

摘要翻译： 本发明涉及一种在空气和水中均等可操作的紧凑型透镜系统，包括具有直接面向空气或水介质的前表面的第一透镜组，前表面的曲率中心大致位于入口 以及位于第一透镜组的像侧的第二透镜组，在第一透镜组和第二透镜组之间形成空气空间。 在透镜系统中选择空气空间和设计参数，使得当空间变化时主要改变透镜系统的场曲率而没有其它像差的任何实质变化，其中空间可响应于预定值 在空气中使用和在水下使用以保持相对平坦的图像表面之间的变化。