Correcting method of light beam position in a scanning apparatus

摘要

One or more light beams are deflected and all beams then combined and scanned by common optical system. Beam positions are detected before scanning mechanism to provide first correction data and after scanning when scanned beams reach recording surface to provide second correction data and two sets are used together to correct beam deflection and thus position of scanned beams. Beam deflector is two-dimensional or number of one-dimensional acousto-optical or electro-optical devices. Independent claims are included for (a) a light beam scanning apparatus (b) and a method of controlling a drive operation of a light beam scanning apparatus.