1 October 1998 Video/optical requirements for a highlight color laser scanner
Author Affiliations +
The desire to print high quality, highlight color documents at production rates has generated the need for a single-pass highlight color laser scanner. We examine a pulsed-imaging, pulse-width-modulated polygon laser scanner that enables multilevel exposure and subsequent development of black and highlight color toner. As currently used in the Xerox 4850 and 4890 digital printers, this laser scanner writes three different exposure levels; zero-level exposure, mid-level exposure and high exposure for black, white, and highlight color, respectively. In this paper we review the functioning of a pulsed-imaging laser scanner and then examine how it is used in a pulse-width-modulated trilevel mode. A first-order linear-systems model is used to examine the specialized video required for achieving uniform line appearance for both black and highlight color. This model further describes how resolution enhancement may be enabled. A complete laser/xerographic model is used to generate simulated output. The electronics that provide the pulse width and position modulated video signals are described, and photomicrographs of sample prints from the Xerox 4850 are shown.
Ronald E. Jodoin, Robert P. Loce, Michael Cianciosi, Martin Banton, "Video/optical requirements for a highlight color laser scanner," Journal of Electronic Imaging 7(4), (1 October 1998). https://doi.org/10.1117/1.482667 . Submission:


Fluorescent Microscopy Enhancement Using Imaging
Proceedings of SPIE (June 12 1986)
Laser Scanning For The Graphic Arts
Proceedings of SPIE (January 10 1977)
Acousto-Optic Laser Scanning
Proceedings of SPIE (April 23 1979)

Back to Top