| 摘要 |
An optical element for laser beam deflection in a raster output scanner (ROS) of an electrophotographic printer. The optical element includes a chamber containing a ferroelectric liquid crystal material having a variable index of refraction as a function of voltage applied thereacross. The ROS includes a control system coupled to a voltage source for applying a voltage across the optical element to control the variable index thereof in conjunction with the rotation of the polygon, facet alignment errors and/or belt motion errors to provide high speed tracking of a light beam.
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