Device and apparatus for scan line skew correction in an electro

Details Device and apparatus for scan line skew correction in an electro Device and apparatus for scan line skew correction in an electro

1992-09-25

1994-11-08

Fuller, Benjamin R.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

359 40, 359 41, G01D 942

Patent

active

053631277

ABSTRACT:
An optical element for the selective scan line skew correction in a raster output scanner (ROS) of an electrophotographic printer. The optical element includes a chamber containing a nematic material having a variable index of refraction as a function of voltage applied thereacross. The chamber has a volume defined by surfaces having progressively decreasing areas 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.

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