A Piezoelectric Actuator with a Motion-decoupling Amplifier for Optical Disk Drives
- A Piezoelectric Actuator with a Motion-decoupling Amplifier for Optical Disk Drives
- 양우성; 이승엽; 유범재
- Electronics and devices; Instrumentation and measurement; Optics, quantum optics and lasers
- Issue Date
- Smart materials & structures
- VOL 19, NO 6, 065027-1-065027-19
- In this paper, an optical pick-up actuator is studied using a multilayered PZT (lead–zirconate–titanate) for possible application to slim and small-form-factor optical disk drives or mobile devices. A theoretical modeling and analysis of the PZT actuator including the dynamics of piezoelectric, electrode and substrate layers are performed to estimate the dynamic properties such as natural frequencies, resultant forces and maximum displacements. In particular, we suggest a novel stroke-amplifying structure enabling the decoupled tracking and focusing motions actuated by four parallel multimorphs. A flexure hinge mechanism is used as the displacement amplifier to extend the allowable stroke of the actuator. Experimental results using a cantilever actuator agree well with the analytical predictions. Based on the theoretical and experimental investigations, we have designed the final model of the optical pick-up actuator with a height of 2.5 mm, showing that the moving range is ± 400 µm at 15 V in the focusing direction, which is appropriate for slim or small-form-factor optical disk drives.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.