| 摘要 |
PURPOSE:To achieve picture processing of high quality whose synchronism with the outside never varies with fluctuations of temperature, by adding the extent of compensation specified in a conversion table to the output of a delay circuit by a picture data processing system which uses an oscillating mirror. CONSTITUTION:The extent of compensation of the oscillation phase of an oscillating mirror 15 for fluctuation temperature near the mirror 15 is held as a conversion table. The output of the thermistor 23 of a temperature sensor near the oscillating mirror 15 is converted into a digital signal, and the current fluctuations of temperature is used as an address to read the corresponding extent of compensation out of the conversion table in a read-only memory 21; and it is applied to a delay circuit 13 to adjust the oscillation phase finely. Therefore, picture data from a data acquiring circuit 18 is nearly in phase with the synchronizing signal generating circuit 12. |
