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Erschienen in: Microsystem Technologies 1/2020

23.03.2019 | Technical Paper

Minimization of mixed-color image noise caused by shape error of polygonal mirror in color-laser printing system

verfasst von: Hyun Choi, No-Cheol Park, Wan-Chin Kim

Erschienen in: Microsystem Technologies | Ausgabe 1/2020

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Abstract

A color-laser printing system consisting of a tandem laser scanning unit uses four laser diodes and a single polygonal mirror (PM) to expose light onto four photo-conductive drums. In this study, we developed a method to reduce periodical image noise, which is mainly generated during scanning by shape errors in a PM, during color mixing of a color-laser scanning system. Through fundamental optical and image analyses, the horizontal dot shift induced by shape errors in the PM was expected to generate visible image noise with a period of 2.8 mm. In addition, the dominant cause of the horizontal dot shift was the peak-to-valley error and the pyramidal angle of each mirror. In order to reduce the periodical image noise (moiré) in color mixing, a horizontal-synchronization detection-optics layout was proposed, and its effectiveness was verified through image-printing experiments.

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Metadaten
Titel
Minimization of mixed-color image noise caused by shape error of polygonal mirror in color-laser printing system
verfasst von
Hyun Choi
No-Cheol Park
Wan-Chin Kim
Publikationsdatum
23.03.2019
Verlag
Springer Berlin Heidelberg
Erschienen in
Microsystem Technologies / Ausgabe 1/2020
Print ISSN: 0946-7076
Elektronische ISSN: 1432-1858
DOI
https://doi.org/10.1007/s00542-019-04399-y

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