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

Hyun Choi, No Cheol Park, Wan Chin Kim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)25-32
Number of pages8
JournalMicrosystem Technologies
Issue number1
Publication statusPublished - 2020 Jan 1

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2017R1D1A1B03036114) and newly appointed professor research fund of Hanbat National University in 2018.

Publisher Copyright:
© 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Hardware and Architecture
  • Electrical and Electronic Engineering


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