抄録
A new objective lens actuator structure for optical disc drives was developed. Three magnets were assembled as a magnetic circuit in the actuator. One magnet is placed in the center of one side of the moving part, and two other magnets are arranged at both ends of the other side of the moving part. This structure can prevent the actuator from rolling along the rolling axis of the moving part. According to the calculation and experimental results, the developed actuator shows that the inclination of the objective lens at the resonance frequency of rolling mode is reduced to 60%, compared with a conventional structure.
