| 摘要 |
<p>PURPOSE:To make it possible to measure the amount of dampening water on a plate surface by widening a measuring range while reducing a measuring error, by measuring the intensity of mirror surface reflected light from the plate surface while allowing parallel light to be incident to the plate surface. CONSTITUTION:Emitted beam from a laser apparatus 1 is guided to the collimeter 3, which is attached to a sensor 29, through an optical fiber 2 and incident to the plate surface of a plate cylinder 10. The light receivers 4, 4' of the sensor 29 respectively detect lights reflected to the direction of mirror surface reflected light theta and the direction of diffused light at a reflective angle of 0 deg. to send electric signals to a processing part 4. On the other hand, detection signals are inputted to a comparator 13 from the encoder 11 and the detecting position register attached to the plate cylinder 10 while a synchronous signal is outputted to the processing part 14 from the comparator 13. The processing part 4 receives the signal from the encoder 11 through synchronous signal generating part 18 and the signal from the sensor 29 to output the measured value to a differential amplifier 30 and a display device 37.</p> |
