Patent ID: 7059523

Claim:
An arrangement for synchronizing a data signal on a pattern of odd and even scan lines with movement of a scan mirror operative for sweeping a light beam along each scan line, the arrangement comprising: a) a drive for periodically oscillating the scan mirror between end positions at opposite ends of a center position; b) an illuminator for transmitting a first light pulse to the scan mirror for reflection therefrom during sweeping of each odd scan line, and for transmitting a second light pulse to the scan mirror for reflection therefrom during sweeping of each even scan line, the first and second light pulses of adjacent odd and even scan lines being of a same time duration; c) a detector for detecting light reflected off the scan mirror by the first and second light pulses to generate first and second detected signals, respectively; and d) a processor operatively connected to the drive, the illuminator and the detector, for processing the first and second detected signals to determine the center position of the mirror for each adjacent odd and even scan line, and for controlling the drive to align the center position for each odd scan line with the center position for each adjacent even scan line for alignment of the pattern of scan lines.