Patent ID: 6710793
Filing Date: 2004-03-23
Classification: G02B,H04N

Abstract:
A light beam scanning apparatus comprising:light emitting means for emitting a light beam, scanning means for reflecting the light beam emitted from the light emitting means to a to-be-scanned surface to scan the to-be-scanned surface by use of the light beam, light sensing means arranged on the to-be-scanned surface or in an equivalent position thereof, for sensing the light beam which is used to scan the to-be-scanned surface by the scanning means, sync signal output means for delaying an output of the light sensing means by a delay amount which is controllable, image forming range setting means for setting an image forming range of the light beam while the sync signal output from the sync signal output means is used as a reference, and control means for controlling the sync signal output means and image forming range setting means to set the image forming range of the light beam to a preset position.