| 摘要 |
PROBLEM TO BE SOLVED: To make exposure for each pixel constant by a simple method.SOLUTION: An exposure device comprises: an exposure part that forms one scanning line by scan-exposing an image surface in a main scanning direction and forms a plurality of pixels arranged in the main scanning direction by use of a plurality of scanning lines shifted in a sub-scanning direction; an oscillation part that generates a clock in which a frequency is diffused in a predetermined modulation period; and a drive part that causes the exposure part to emit light for a light emission time based on the clock. The phase of a modulation waveform WP corresponding to a modulation period is displaced in a plurality of scanning lines SL1 to SL4 such that, for one pixel, a difference corresponding to the reference value of the light emission time is offset between the scanning lines. |
