| 摘要 |
<p>PURPOSE:To make uniform quantities of light emitted from laser diodes, by providing a modulator for outputting laser beam by modulating the beam, and a slitted plate permitting only primary modulated beam of modulated beam to pass therethrough. CONSTITUTION:A plurality of laser diodes 1-1n output laser beam respectively to a plurality of modulators 4-4n. A slitted plate 12 is provided on the output side of the modulators 4-4n to output only specified modulated beam to a print drum 13. The laser beam is outputted from a light-outputting part 6 after being modulated through a light-inputting part 5 of the modulator 4, the modulation being conducted according to a modulating signal 8 with an amplitude inversely proportional to the light emission output of the laser diode 1 which signal is inputted through a modulating signal inputting part 7. Of the modulated beam, only one of primary beam 10 is directed to the print drum 13 while the others are cut off, by the fuction of the slitted plate 12. Thus, the light emission outputs of the laser diodes are compensated for by the modulators, thereby making uniform the light outputs.</p> |
