| 摘要 |
PURPOSE:To easily apply fitting adjustment of a linear image sensor with high accuracy by using a waveform observing means so as to compare a reference signal representing the timing to be outputted for a prescribed ruled line position signal with a prescribed ruled line position signal of a sheet. CONSTITUTION:For example, light blue ruled lines 20 are drawn longitudinally at an equal interval on the surface of a describing sheet 14'. A clock signal generated by a clock generator 42 is inputted to a linear image sensor 24, where the timing is taken and a counter 44 counts the clock pulse to output a reference signal on an oscilloscope 46. Further, an output signal from the linear image sensor 24 is inputted to the oscilloscope 46. The fitting and adjustment of the sensor 24 is attained by moving the image sensor in the direction of arrow (vertical direction) or adjusting the fitting angle of the sensor 24 minutely.
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