| 摘要 |
PURPOSE:To dispense with the previous measurement of a backlash when the result of surface analysis through the reciprocation of a sample is displayed on a cathode-ray tube or the like, by making it possible to adjust the phase or wave form of an x-axis deflection signal for the display, relative to a forward or backward-stroke video signal obtained by the reciprocative scanning of the sample. CONSTITUTION:In correcting the deviation of an image, the width of a luminous spot erasure signal S is adjusted while watching the faceplate of a cathode-ray tube, to change the time point of start of the rise in an x-axis deflection signal B to move the forward-stroke image rightward or leftward to overlay the image on the backward-stroke image. In other words, the wave form of the deflection signal B, a reference wave form for which is shown by a one-dot chain line in the drawing, is modified as shown by a full line therein. The counting of reading clock pulses is started at the time of the fall in a reading signal R. When a prescribed number of the reading clock pulses is counted, the count is cleared. The luminous spot erasure signal S of negative level is applied for the period from the start of the counting to the clearing of the count to erase a luminous line signal.
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