Abstract
We developed an objective lens actuator for slim DVD drives to improve the vibration characteristics so that the servo-control range can be expanded. To reduce the higher-order resonance peak that occurs due to elastic deformation of the moving part, we took vibration modes into consideration when we designed the actuator structure. Thus, we reduce the resonance peak and lighten the moving part because it does not need to be stiff. The results of our experiments show that the higher-order resonance peak at 16 kHz in the autofocusing direction is reduced to less than 3 dB. The acceleration sensitivity in the auto-focusing direction and tracking direction is 97 m/s^2/V and 92 m/s^2/V respectively. These values meet the requirements for 8X DVD-ROM and 32X CD-ROM drives.
