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19 条记录 (耗时 0.022 秒)

    Finder of variable magnification
    1.
    发明授权
    Finder of variable magnification 失效
    Finder的可变放大倍数

    公开(公告)号：US4842395A

    公开(公告)日：1989-06-27

    申请号：US159471

    申请日：1988-02-19

    申请人： Yasuhisa Sato ,  Nozomu Kitagishi ,  Yasuyuki Yamada ,  Hiroki Nakayama ,  Kouji Oizumi

    发明人： Yasuhisa Sato ,  Nozomu Kitagishi ,  Yasuyuki Yamada ,  Hiroki Nakayama ,  Kouji Oizumi

    IPC分类号： G02B25/00 ,  G02B15/16 ,  G02B15/177 ,  G02B23/14 ,  G03B13/12

    CPC分类号： G02B15/177 ,  G02B23/145

    摘要： The disclosed variable magnification finder includes, from front to rear, a first lens unit of negative power, a second lens unit of positive power, a third lens unit of positive power, the first, second and third lens units constituting an objective lens of positive power, and an eyepiece of positive power. The first and second lens units form a finder image on a plane just in front of the third lens unit. The second lens unit is moved axially forward to increase the image magnification, while the shift of diopter of the finder is simultaneously compensated for by moving the first lens unit.

    摘要翻译： 所公开的可变倍率取景器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，正光焦度的第三透镜单元，构成正的物镜的第一，第二和第三透镜单元 权力和一个正面力量的目镜。 第一和第二透镜单元在刚好在第三透镜单元前面的平面上形成取景器图像。 第二透镜单元轴向移动以增加图像放大率，同时通过移动第一透镜单元来同时补偿取景器的屈光度偏移。

    Zoom lens of short total length
    6.
    发明授权
    Zoom lens of short total length 失效
    变焦镜头长度短

    公开(公告)号：US4726668A

    公开(公告)日：1988-02-23

    申请号：US741634

    申请日：1985-06-05

    申请人： Hiroki Nakayama ,  Yasuhisa Sato ,  Kouji Oizumi ,  Yasuyuki Yamada

    发明人： Hiroki Nakayama ,  Yasuhisa Sato ,  Kouji Oizumi ,  Yasuyuki Yamada

    IPC分类号： G02B13/18 ,  G02B15/16 ,  G02B15/00

    CPC分类号： G02B15/161

    摘要： In the disclosed zoom lens, a positive front lens unit and a negative rear lens unit are moved forwardly axially in differential relation to vary the overall focal length from a minimum to a maximum value, while a positive middle lens unit is kept stationary during the variation of the focal length. A diaphragm determining the F-number is positioned at a fixed point between the front and rear lens units.

    摘要翻译： 在所公开的变焦镜头中，正前透镜单元和负后透镜单元以差分关系向前轴向移动，以将整个焦距从最小值变化到最大值，而正中间透镜单元在变化期间保持静止 的焦距。 确定F数的隔膜位于前后透镜单元之间的固定点。

    Beam splitter for changing optical paths small tilt
    7.
    发明授权
    Beam splitter for changing optical paths small tilt 失效
    光束分离器用于改变光路小倾斜

    公开(公告)号：US4697882A

    公开(公告)日：1987-10-06

    申请号：US772769

    申请日：1985-09-05

    申请人： Yasuhisa Sato ,  Yasuyuki Yamada ,  Hiroki Nakayama ,  Kouji Oizumi

    发明人： Yasuhisa Sato ,  Yasuyuki Yamada ,  Hiroki Nakayama ,  Kouji Oizumi

    IPC分类号： G02B27/10 ,  G02B7/18 ,  G02B23/04 ,  G02B26/08 ,  G02B27/14 ,  G03B13/02

    CPC分类号： G02B27/126 ,  G02B23/04 ,  G02B7/1805

    摘要： In the disclosed beam splitter, a first prism has an entrance face, an inclined face, and a mirrored face for totally reflecting a beam reflected from the inclined face back to the inclined face. A second prism has an entrance face in parallel with the inclined face of the first prism, and two exit faces. One of the exit faces of the second prism cooperates with the mirrored face of the first prism. When the first and second prisms are turned as a unit, the inclined face of the first prism either passes a light beam arriving from the entrance face through to the second prism and out one of the exit faces or totally reflects the arriving light beam to the mirrored face. The light beam reflected back from the mirrored face now passes through the inclined face to the second prism and out the cooperating exit face of the second prism.

    摘要翻译： 在公开的分束器中，第一棱镜具有入射面，倾斜面和镜面，用于将从倾斜面反射的光束全反射回倾斜面。 第二棱镜具有与第一棱镜的倾斜面平行的入射面和两个出射面。 第二棱镜的出射面之一与第一棱镜的镜面配合。 当第一和第二棱镜作为一个单元转动时，第一棱镜的倾斜面或者将从入射面到达的光束通过到第二棱镜，并将出射面中的一个出射面全部反射到 镜面。 从镜面反射回来的光束现在通过倾斜面到达第二棱镜并离开第二棱镜的配合出射面。

    Photographic optical device with variable magnification
    9.
    发明授权
    Photographic optical device with variable magnification 失效
    具有可变放大倍数的摄影光学装置

    公开(公告)号：US4871238A

    公开(公告)日：1989-10-03

    申请号：US19687

    申请日：1987-02-27

    申请人： Yasuhisa Sato ,  Yasuyuki Yamada ,  Hiroki Nakayama ,  Kouji Oizumi

    发明人： Yasuhisa Sato ,  Yasuyuki Yamada ,  Hiroki Nakayama ,  Kouji Oizumi

    IPC分类号： G02B15/10

    CPC分类号： G02B15/10

    摘要： A photographic optical device of this invention comprises: a master lens unit having a positive refractive power, determining a photographic optical path and moving along the optical axis to change magnification; a first auxiliary lens unit having a positive refractive power and being capable of being placed on and off the optical path; and a second auxiliary lens unit having a negative refractive power and being capable of being placed on and off the optical path. The first auxiliary lens unit is attached to an image-plane side of the master lens unit to form a photographic unit giving a low ratio of magnification. The second auxiliary lens unit is attached to an image-plane side of the master lens unit to form another photographic unit giving a high ratio of magnification. The first and second auxiliary lens units are placed outside of the optical path to form another photographic unit giving a middle ratio of magnification.

    摘要翻译： 本发明的照相光学装置包括：主透镜单元，具有正的折光力，确定照相光路并沿着光轴移动以改变放大率; 第一辅助透镜单元，具有正的折光力并且能够放置在光路上或从光路上放置; 以及具有负屈光力并且能够放置在光路上和从光路上的第二辅助透镜单元。 第一辅助透镜单元附接到主透镜单元的图像平面侧，以形成具有低倍率的照相单元。 第二辅助透镜单元附接到主透镜单元的像平面侧，以形成另一个具有高倍率比的照相单元。 第一辅助透镜单元和第二辅助透镜单元被放置在光路外部，以形成另一个具有中等比例的照相单元。