Banding is an image artifact that appears as peroidic light and dark bands across a page. This paper presents an experimental study on the application of a piezoelectric laser beam deflection device to reduce banding in the electrophotographic process. An empirical model was obtained using system identification techniques by measuring the laser beam position on-line using an optical sensor. A closed loop control strategy is then proposed and implemented. Experiments conducted without actually printing showed significant improvements in reducing the scan line positioning errors using the proposed method.

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