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120 条记录 (耗时 0.015 秒)

    Rotatable focusing means and variable magnification electrophotocopier
    1.
    发明授权
    Rotatable focusing means and variable magnification electrophotocopier 失效
    可旋转聚焦装置和可变放大倍数的电子复印机

    公开(公告)号：US5146276A

    公开(公告)日：1992-09-08

    申请号：US122530

    申请日：1987-11-19

    申请人： Benzion Landa

    发明人： Benzion Landa

    IPC分类号： G03B27/36 ,  G03B27/50 ,  G03G15/041

    CPC分类号： G03B27/36 ,  G03B27/50 ,  G03G15/041

    摘要： A variable magnification electrophotographic copier wherein the ratio of object and image distances is changed by rotating a focusing device about an axis orthogonal to its optical axis. In a preferred embodiment, the focusing device is a refractive lens having a shape factor different from zero; the rotational axis intersects the optical axis; and the rotation angle is 180.degree. selectively to reverse the lens surfaces and provide images of two different magnifications each having minimum spherical aberration.

    摘要翻译： 一种可变放大型电子照相复印机，其中通过使聚焦装置围绕与其光轴正交的轴线旋转来改变物体和图像距离的比例。 在优选实施例中，聚焦装置是具有不同于零的形状因子的折射透镜; 旋转轴与光轴相交; 并且旋转角度选择性地为180度以反转透镜表面并且提供具有最小球面像差的两个不同放大率的图像。

    Magnification varying mechanism for image forming apparatus
    2.
    发明授权
    Magnification varying mechanism for image forming apparatus 失效
    成像装置的放大变化机构

    公开(公告)号：US4870453A

    公开(公告)日：1989-09-26

    申请号：US232443

    申请日：1988-08-15

    申请人： Kenichi Shimizu ,  Shigeru Suzuki

    发明人： Kenichi Shimizu ,  Shigeru Suzuki

    IPC分类号： G03B27/36

    CPC分类号： G03B27/36

    摘要： A copier for providing photographic copies of different sized originals, having an optical system variable for altering the magnification of an original, a scale member movable to locate the end of each respective size of original on the copier, and a link mechanism intercoupling the optical system and the scale to automatically vary the system magnification in accordance with the location of the scale.

    摘要翻译： 一种用于提供不同大小的原稿的照相副本的复印机，具有用于改变原稿放大率的光学系统变量，可移动以将每个相应尺寸的原稿的端部定位在复印机上的刻度部件，以及将光学系统 并根据刻度的位置自动改变系统放大倍数。

    Device for exposing discrete portions of a photosensitive surface by means of a light beam
    3.
    发明授权
    Device for exposing discrete portions of a photosensitive surface by means of a light beam 失效
    用于通过光束曝光感光表面的离散部分的装置

    公开(公告)号：US4653882A

    公开(公告)日：1987-03-31

    申请号：US835041

    申请日：1986-02-28

    申请人： Roland Cerf

    发明人： Roland Cerf

    IPC分类号： B41B13/00 ,  B41B17/06 ,  B41B21/22 ,  G03B27/34 ,  G03B27/36 ,  G03F1/00 ,  G03F1/02 ,  G03B41/00

    CPC分类号： G03B27/36 ,  B41B17/06 ,  B41B21/22

    摘要： The device comprises a lamp which directs a light beam to a photosensitive surface through symbols contained on a rotating disc, along a straight axis without changement of direction, the distance between the lamp and the sensitive surface being maintained constant. The device further comprises an enlarging objective movable along the optical axis and allowing to vary continuously the size of the projection of the symbols between two limits, namely between about 0.5 and 1.5 times the normal size of the symbols.

    摘要翻译： 该装置包括一个灯，其通过沿直线轴线容纳在旋转盘上的符号将光束引导到光敏表面，而不改变方向，灯和敏感表面之间的距离保持恒定。 该装置还包括可沿着光轴移动的放大物镜，并且允许在两个极限之间，即在符号的正常尺寸的大约0.5和1.5倍之间连续地改变符号的投影的尺寸。