| 摘要 |
PURPOSE:To make it possible to rotate, expand, or reduce the input image all electronically, and improve the reliability, by producing a control signal depending on a preset program at a rotary member or a zooming member, and outputting the image with converted magnification or angle of the figure input to the photoelectric cathode of a preprocessing tube. CONSTITUTION:The incident input image to the photoelectric cathode 1 of a preprocessing tube 11 is converted into a photoelectric image. In this case, in order to expand or reduce the photoelectric image, the voltage fed from the output terminal a of a power source 7 to an electrode of an acceleration/ focus electron range system 2 is controlled. In order to rotate the image, the current from the output terminal b of the power source 7 to a coil 6 is converted, and moreover, to shift the image two-dimensionally, the voltage c to be applied to a deflection electrode 3 is controlled. The electronic image which has received the effect of the rotary system or the expansion/reduction system is radiated on a microchannel plate 4, and multplied there, and then it excites a phosphor 5 to illuminate.
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