Improvement of dynamic characteristics for optical pickup actuator by magnetic circuit

K. T. Lee, C. J. Kim, N. C. Park, Y. P. Park

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


As disk rotational speed of optical disk drives (ODD) increases, an optical pickup actuator has a high servo bandwidth for its focusing and tracking control to follow dynamic disturbances by high rotational speed in ODD. However, the servo bandwidth is limited by some vibration modes due to the flexibility of the moving part in the actuator. In this paper, the influence of the driving forces generated by VCM on excitation of flexible modes of the moving part in high frequency range is analyzed. Especially, in order to reduce the first flexible mode affecting the servo bandwidth, it is attempted to modify force distribution on coils. The magnetic simulation is performed by using finite element analysis, and compared with experimental results. Finally, it is shown that flexible mode vibration can be suppressed by proper design of magnetic circuit.

Original languageEnglish
Pages (from-to)232-242
Number of pages11
JournalMicrosystem Technologies
Issue number4
Publication statusPublished - 2003 Mar

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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