| 摘要 |
An optical element (50), for selective scan line skew correction in a raster output scanner (ROS) of an electrophotographic printer, includes a chamber (54) containing a nematic material having a variable index of refraction as a function of voltage (58) applied thereacross. The chamber has a volume defined by surfaces having progressively decreasing widths in substantially perpendicular planes. The ROS includes a control and feedback system coupled to a variable voltage source for applying a biasing voltage across the optical element to control the variable index of refraction of the nematic material for selectively correcting scan line skew. <IMAGE> |
