Patent ID: 6292208
Filing Date: 2001-09-18
Classification: H04N

Abstract:
A scanning system comprising:a surface moving in a process direction at a velocity Vp/r;at least two imagers, each imager being able to simultaneously form a beam spot on the surface, the beam spots moving and being simultaneously aligned in a direction transverse to the process direction to form a single scan line at a time of a certain length;at least two writing fields corresponding to the at least two imagers and defined by a range that each beam spot is capable of covering on the surface in order to form the scan line, the writing fields being adjacent to each other and overlapping on one region having a length defined by a fraction of the length of the scan line; anda plurality of sensors for detecting chevron marks formed on the surface by the imagers, each sensor aligned in the process direction with a point in the region where a pair of writing fields overlap.