| 摘要 |
PROBLEM TO BE SOLVED: To perform improvement of laser exposure accuracy, precise control of exposure dot position, and reduction in exposure deviation, and to provide a tandem full-color printer that does not have a no fθlens. SOLUTION: A laser exposure apparatus is equipped with means 21, 41 for generating a pulse signal VCLK of a frequency corresponding to frequency-designating data NLD; a means 46 for generating pixel clock PCLK of a phase specified by phase designating data DPHASE in the integer multiples of the period of the pulse signal; a memory 77 for holding the frequency designating data NLD and the phase-designating data DPHASE for the purpose of converting the constant angular velocity laser scanning of a polygon mirror to a constant velocity transfer along the line of the on-line exposure dot; means 72-76 for switching/reading data from the memory, corresponding to the on-line exposure scanning; and a laser drive circuit 23 for controlling the light emission of a laser light source, according to image DATA in synchronism with the pixel clock. When the frequency of the pixel clock is high, the light emission quantity of the laser light source is increased. COPYRIGHT: (C)2007,JPO&INPIT |
