Development of three-axis actuator for HD-DVD

Dong Ju Lee, Kang Nyung Lee, No Cheol Park, Young Pil Park

Research output: Contribution to journalArticle

6 Citations (Scopus)


There is much research being conducted on developing information storage devices based on formats of Blu-ray Disc (BD) and HD-DVD with requirements for high-density storage devices. This trend is set toward the use of a short-wave length laser and objective lens (OL) with high numerical aperture in optical storage devices. However, it causes the rapid decrease of tilt margin. Therefore, it is necessary that an actuator control tilt motion and have fast access tune to get a stable signal. In this paper, a mathematical form of a three-degrees-of-freedom (DOF) coupled model was formulated and magnetic circuit in mechanical constraints was efficiently designed through at trial-and-error method using electromagnetic (EM) analysis. Finally, in order to have fast access time, a three-axis actuator whose rotational center is put on a lens center through redesign of tilting magnetic circuit was suggested. This design targets were evaluated by experiments.

Original languageEnglish
Pages (from-to)1050-1052
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number2
Publication statusPublished - 2005 Feb 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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