Patent ID: 7652682
Filing Date: 2010-01-26
Classification: G03G

Abstract:
1. An image forming apparatus including a reference clock output unit that outputs a reference clock, an image clock generation unit that divides the outputted reference clock by a set multiple and generates an image clock based on the division, and a synchronization signal detection unit that detects a synchronization signal for synchronizing the timing of the start of optical scanning by a laser beam, the image forming apparatus irradiating the laser beam based on the synchronization signal detected by the synchronization signal detection unit and the image clock generated by the image clock generation unit, and comprising: a detection unit configured to detect a width of the synchronization signal detected by the synchronization signal detection unit from when the signal goes to active to when the signal returns to non-active; and a correction unit configured to correct the multiple based on the width of the synchronization signal as detected by the detection unit in the optical scanning whose line is the same as the optical scanning line in which the width of the synchronization signal is detected.