Fidelity Control Of Electrophotographic Print Process

J. L. Crawford

doi:10.1117/12.952820

6 July 1989 Fidelity Control Of Electrophotographic Print Process

J. L. Crawford

Proceedings Volume 1079, Hard Copy Output; (1989) https://doi.org/10.1117/12.952820
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

The stroke-width and halftone print fidelity from an electrophotographic (EP) printer is dependent on the size and shape of the discharge exposure spot. However, there are conflicting requirements on the spot size in that a large spot is needed to prevent scan lines in discharge areas, while a small spot is needed to print fine details. Others have proposed methods of optimizing the spot size. This paper presents the analysis and experimental verification of a data-dependent method of exposure control that allows the simultaneous satisfaction of both requirements. The result is better print fidelity over a broad range of applications from text to halftone images. This approach also leads to the more general result that, under certain conditions, the print fidelity from EP printers can be independently controlled, thereby allowing a greater latitude in the optimization of electrostatic set points, developer parameters, and optical spot size. This independence also allows relatively simple compensation for variations in other parameters that affect fidelity as well as adjustments based on user preference.

Citation Download Citation

J. L. Crawford "Fidelity Control Of Electrophotographic Print Process", Proc. SPIE 1079, Hard Copy Output, (6 July 1989); https://doi.org/10.1117/12.952820

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