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    • 82. 发明公开
    • Electrostatic copying apparatus
    • 静电复印设备
    • EP0093307A1
    • 1983-11-09
    • EP83103748.6
    • 1983-04-19
    • MITA INDUSTRIAL CO. LTD.
    • Kimura, HiroshiHisajima, MasahikoShibata, KiyoshiIrie, YoichiroMorimoto, KiyoshiNagashima, TakashiYoshikawa, YasuhikoYamamoto, KiyonoriWatashi, MasahiroYoshinaga, ShinsukeYamamoto, Toshihiko
    • G03G15/052
    • G03G15/041G03B27/527G03G15/28
    • A variable magnification electrostatic copying apparatus comprising a transparent plate (4) on which to place a document to be copied, an optical system (62, 66, 72, 70, 60, 78) for projecting the image of the document onto an electrostatographic photosensitive member (10) at any desired projecting ratio selected from a plurality of projecting ratios in an exposure zone (26) located along the moving path of the photosensitive member, and a driving means for moving at least a part of the optical system and the transparent plate relative to each other. The optical system includes at least one position-variable optical element assembly (74) adapted to be held at any of a plurality of positions corresponding to the aforesaid plurality of projecting ratios. The variable magnification electrostatic copying apparatus includes a unique improved means (182) for varying the projecting ratio of the optical system by moving the position-variable optical element assembly.
    • 一种可变放大率的静电复印设备,包括:一个放置待复印文件的透明板(4);一个光学系统(62,66,72,70,60,78),用于将文件图像投影到静电照相光敏材料 (26)中的多个突出比率中选择的任意期望的突出比率的光学元件(10),以及用于移动所述光学系统的至少一部分和所述透明元件 板相对于彼此。 该光学系统包括至少一个位置可变光学元件组件(74),其适于保持在对应于上述多个突出比的多个位置中的任何位置。 可变放大率静电复印设备包括一个独特的改进装置(182),用于通过移动位置可变光学元件组件来改变光学系​​统的投影比率。
    • 86. 发明公开
    • Pixel magnification/demagnification apparatus and method
    • Apparat und Verfahren zurVergrösserungoder Verkleinerung von Bildelementen。
    • EP0035875A2
    • 1981-09-16
    • EP81300918.0
    • 1981-03-05
    • XEROX CORPORATION
    • Crean, Peter A.Agulnek, Martin A.
    • G03B27/32G03F1/00
    • G03G15/041G06T3/40H04N1/3935
    • Pixel magnification/demagnification apparatus and method are disclosed for controlling the size of reproducible image, the image being represented by video image signals or pixels generated by a raster scanner (12). A binary rate multiplier (102) is used for image size control along the X-axis, the multiplier being programmed to the size image desired to vary the frequency of the pixel clock signals output by the multiplier. A control flip-flop (45) astride the image pixel stream is driven by the multiplier clock signals to speed up or reduce the rate at which image pixels are output with consequent change in image size along the X-axis.
      For image size control along the Y-axis, a phase lock loop (86) control with programmable frequency generator (82) is provided for the scanning carriage drive motor (39). The frequency output of the generator is settable to the image size desired, changes in image size along the Y-axis being achieved either by increasing or decreasing the rate at which the scanning carriage (32) is moved.
    • 公开了用于控制可再现图像的尺寸的像素放大/缩小装置和方法,该图像由视频图像信号或由光栅扫描器(12)生成的像素表示。 二进制比例乘法器(102)用于沿着X轴的图像尺寸控制,乘法器被编程到期望的尺寸图像以改变乘法器输出的像素时钟信号的频率。 跨越图像像素流的控制触发器(45)由乘法器时钟信号驱动以加速或降低图像像素输出的速率,随之沿着X轴的图像尺寸的变化。 对于沿着Y轴的图像尺寸控制,为扫描托架驱动马达(39)提供了具有可编程频率发生器(82)的锁相环(86)控制。 发电机的频率输出可设定为所需的图像尺寸,通过增加或减少扫描滑架(32)移动的速率来实现沿着Y轴的图像尺寸的变化。