| 摘要 |
PURPOSE:To provide an exposure device making a plate by the simultaneous exposure of two sides, in which the printing start position of two sides, a size reduction factor and a position for electrification operation are easily adjusted. CONSTITUTION:In this exposure device, simultaneous two-side exposure in terms of data from 1st and 2nd video data generation circuits 401 and 402 is performed to a carried printing plate with laser beams from 1st and 2nd laser beam emission circuits 331 and 332 by a polygon mirror 32. The moving amount of the printing plate in a subscanning direction is adjusted according to a counted value from a pulse counter 44 designated from an operator panel 45 and counted values from 1st and 2nd line number counters 371 and 372 based on detection signals from 1st and 2nd BDE sensors 351 and 352. Then, the printing start position of the specified line of the printing plate is adjusted according to counted values from 1st and 2nd clock number counting counters 361 and 362 based on detection signals from 1st and 2nd BDS sensors 341 and 342. |
