Patent ID: 6124948
Filing Date: 2000-09-26
Classification: H04N

Abstract:
A synchronization detection method for a multi-beam optical scanning and image writing apparatus, said method comprising:(a) emitting a plurality of light beams, at least two of said beams being employed for synchronization of write timings for recording of images on a surface;(b) controlling said at least two light beams to scan said surface in parallel to each other along a main scanning direction and to write images on said surface;(c) employing a plurality of light sensors positioned side by side along said main scanning direction to detect said at least two light beams at a given position as said at least two light beams scan along said main scanning direction; and(d) processing output signals of at least two of said light sensors to determine synchronization of said write timings on the basis of a positional shift of said at least two light beams relative to one another in said main scanning direction.