Abstract

In optical disc system, 4-wire actuator has undesired tilt which degenerates the performance of RF signal. This tilt occurs from moment around the axis parallel to the tangential direction of the disk. The main reason of the moment is the coupling effect between focus driving system and tracking driving system. This paper constructed tilt mechanism and analyzed tilt quantity due to the moment based on structural analysis and magnetic field analysis. And the experiment about tilt was executed. The results were compared and discussed about the difference. Then, the design method for reducing tilt angle was suggested.

Keywords

• optical disc;
• pickup actuator;
• 4-wire;
• tilt;
• FEM;
• CD(compact disc);
• DVD(Digital Video Disc)

• 광디스크;
• 픽업 구동기;
• 4와이어;
• 경사;
• 유한요소법;