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AssigneeXerox Corporation
InventorsJames J. Appel, Thomas L. Paoli
Estimating the term…
A method of slow, or process, scan direction spot registration or position control in an optical output device, such as a raster output scanner (ROS), may be facilitated by interposing in the image path an electro-optic element whose angular dispersion varies for a given wavelength as a function of the electrical bias applied to it. By orienting the electro-optic element such that dispersion control is perpendicular to the fast or line scan direction of the ROS, varying the electrical bias applied to it varies the dispersion in the slow scan direction. The electro-optic element may be, for example, a prism of AlGaAs. Bias applied to the electro-optic element may be in response to the output of a means for detecting and quantifying such positional errors and/or in response to predetermined correction information output from a processor controlled memory unit or the like. Spot position for single or multiple beam optical output device may be achieved.
A method of controlling the slow scan direction position at which a beam of light is focussed to a spot upon an image plane in an optical output system, comprising the steps of:
A method of controlling the slow scan direction position of a light beam focused to a spot on an image plane in a raster output scanning apparatus, comprising the steps of:
A method of controlling the slow scan direction position of a light beam focused to a spot on a photoreceptive element in a raster output scanning apparatus, comprising the steps of:
Dependencies are inferred from the claim text.