High-resolution high-speed laser recording and printing using low-speed polygons

Mahmoud Razzaghi

doi:10.1117/12.46347

1 August 1991 High-resolution high-speed laser recording and printing using low-speed polygons

Mahmoud Razzaghi

Proceedings Volume 1458, Printing Technologies for Images, Gray Scale, and Color; (1991) https://doi.org/10.1117/12.46347
Event: Electronic Imaging '91, 1991, San Jose, CA, United States

Abstract

The deflecting facet of a rotating polygon is used very efficiently to perform multiple deflection of a laser beam in an underfilled mode with the help of a fixed mirror. The resulting larger deflection angle and higher resolution allow the use of a large number of facets on the polygon without compromising on facet width or resolution. By special configuration of the beam, the major part of cross scan facet error, which tends to multiply accordingly, is reduced in a self-correcting mode during the multiple-deflection process. The remaining part of the error is corrected through the anamorphic imaging optics. With the large number of facets allowing low rotational speeds, and with relaxed tolerances and simple optics, practical and cost-effective high-resolution and high-speed laser recorders and printers are made possible. Closed form formulas are developed for ray tracing and design of the system.

Citation Download Citation

Mahmoud Razzaghi "High-resolution high-speed laser recording and printing using low-speed polygons", Proc. SPIE 1458, Printing Technologies for Images, Gray Scale, and Color, (1 August 1991); https://doi.org/10.1117/12.46347

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