Image forming apparatus which corrects a deviation in a distance between plural light beams

摘要

In an image forming apparatus for simultaneously recording plural image lines on a recording medium by scanning simultaneously with plural light beams along parallel scanning lines in a primary scanning direction, two light beam detectors each having a starting-side are arranged in such a way that the starting-sides are not in parallel to each other so that the distance between the starting-sides differs depending on the scanning line. The difference in the distances of two light beams is measured, and the deviation between the two light beams is determined on the basis of the difference in the distances.