Patent ID: 7139013

Claim:
A laser scanning control apparatus comprising: a light source driven in accordance with image data defined in pixels and adapted to emit a laser beam; a rotating polygon mirror for scanning the laser beam emitted from the light source in a main scanning direction of an image bearing member; and a correction portion for, every one or more correction points on a main scanning line of the image bearing member to be scanned with the laser beam, extending the pixel length for each pixel located in the correction point concerned to thereby correct the scanning magnification of the main scanning line, and for changing the rotational speed of the rotating polygon mirror to correct the magnification in a sub scanning direction to thereby correct the output magnification, wherein the correction portion adds, as a next bit data, a same bit data as a predetermined bit data of pixel-division-modulated pixel data of the pixel located at the correction point to thereby extend a pixel length for the pixel located at the correction point.