Patent ID: 6243123
Filing Date: 2001-06-05
Classification: H04N

Abstract:
A light beam scan apparatus comprising:light beam generating means for generating a light beam;scan means for reflecting the light beam, generated by the light beam generating means, to both a scan surface and a plurality of light detection means, and for scanning both the scan surface and the plurality of light detection means with the light beam in a main scan direction;the plurality of light detection means, arranged near the scan surface and in the sub-scan direction, for receiving the light beam reflected and scanned by the scanning means, and outputting a corresponding signal;position determination means for determining, on the basis of the signal output from the light detection means, the position in the sub scan direction of the light beam scanned by the scan means; andcontrol means for controlling the position in the sub-scan direction of the light beam scanned by the scan means on the scan surface at a predetermined position, on the basis of the determination result of the position determination means.