Design and analysis of a mini linear optical pickup actuator

Joon Hyuk Park, Yoon Su Baek, Young Pil Park

Research output: Contribution to journalArticlepeer-review


This paper describes a mini linear optical pickup actuator. To reduce the size, inner yokes are designed to guide the mover and outer yokes of permanent magnets are removed. Magnetic circuit method is used to determine the thrust force. Virtual path method is proposed to analyze the open magnetic circuit analysis. The magnetic circuit of the proposed actuator can be a closed circuit due to the virtual path model of the outer magnetic flux. The validity of virtual path method is evaluated by comparing to the FEM analysis. Structural vibration is investigated using FEM and the design of the mover is modified to improve the vibration characteristic. Dynamic characteristic experiments shows that the performance of the proposed actuator is enough to be used as a coarse and fine seeking actuator simultaneously and the thrust force margin for loading a focusing actuator is guaranteed.

Original languageEnglish
Pages (from-to)1616-1627
Number of pages12
JournalKSME International Journal
Issue number11
Publication statusPublished - 2003 Nov

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering


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