US Patent 7466332 Light scanning unit

A light scanning unit that corrects skew of a scanning line. The light scanning unit, which scans light on an exposed surface of a photosensitive medium, includes a light source to generate and illuminate at least one beam that corresponds to an image signal while being controlled on and off. A beam deflector deflects and scans a beam provided from the light source. A reflection mirror is obliquely arranged so that a scanning line directed to the exposed surface may be inclined with respect to a segment perpendicular to a transferring direction of the exposed surface to direct the scanning line to the exposed surface of the photosensitive medium by reflecting the scanning line provided from the beam deflector.