| 摘要 |
<p>A printer that corrects for polygon phasing errors includes a raster output scanner (27), a moving photoreceptor (10), a page sensor (304) for sensing the position of an image area, a start-of-scan sensor (312) for sensing the start of scan, a light valve array (216) having a plurality of electrically controlled light valves for selectively passing light, and a system controller (101) that controls the light valve. The system controller (101) initially selects one of the light valves. When the page sensor (304) senses the beginning of a page the system controller (101) starts selecting sequential light valves at a controlled rate. After a start-of-scan occurs the system controller (101) stops sequencing the light valves. The light valve that passed light when the start-of-scan occurred continues to pass light. Beneficially, the system controller monitors the photoreceptor (10) motion. If the photoreceptor motion changes the system controller (101) then selects a light valve that moves the scan line toward the proper position. <IMAGE></p> |
