Abstract
As the density in optical data storage systems increases, a drive capable of tilt control thus becomes necessary in order to improve the tilt margin as the coma aberration is accordingly increased. In this paper, we propose an innovative three-axial actuator based on a traditional four-wire scheme with an additional pair of tilting magnets. The proposed coil-driven servo can independently compensate ± 1 tilt degree associated with a torque variation of less than 5 %. The driving forces of the focusing and tracking are kept constant while the tilt servo is activated.
Original language | English |
---|---|
Pages (from-to) | 4102-4105 |
Number of pages | 4 |
Journal | IEEE Transactions on Magnetics |
Volume | 43 |
Issue number | 12 |
DOIs | |
State | Published - 1 Dec 2007 |
Keywords
- Electromagnetic force
- Magnetization
- Optical pickup actuator
- Three-axis