Device and apparatus for scan line process direction control in a multicolor electrostatographic machine.

摘要

An optical element (50) for the selective deflection of a scan line in a process direction in a raster output scanner (ROS) electrophotographic printer (10). The optical element includes a chamber (54;Fig. 3) containing a nematic liquid crystal material having a variable index of refraction (n1(V)) as a function of voltage applied thereacross (Fig.2). The ROS includes a control and feedback system coupled to a variable voltage source (58) for applying a biasing voltage (V) across the optical element (50) to control the variable index of refraction (n1(V)) of the optical element for selectively deflecting the scan line in the process direction.