Patent ID: 6317246
Filing Date: 2001-11-13
Classification: G02B

Abstract:
A multi-beam scanning apparatus comprising:a plurality of light sources arranged to be independently driven to modulate light according to an image signal and to emit a plurality of beams;a rotating deflector arranged to receive the plurality of beams emitted from the plurality of light sources and to deflect the beams via a reflective deflecting surface thereof;an image scanning forming lens arranged to receive the deflected beams from the deflector and to condense the deflected beams so as to form optical spots on a scanning surface such that the spots being separated from each other in the sub-scanning direction and such that a plurality of lines on the scanning surface are simultaneously scanned via the optical spots at a substantially constant velocity as the deflector rotates; whereinmodulation frequencies of the at least two light sources are different from each other so that the writing widths of the at least two light sources are substantially equal.