부산대학교 도서관

Flexible optical disks (FODs) can be rotated at 15,000 rpm and have the capability of recording at 250 Mbps, the rate necessary for a high definition video recording system (HD-D5). Although the conventional stabilization system can suppress the axial run-out of FODs to approximately 1/10 (${\leq}10$ \mbox{$\mu$m}) of that of current optical disks, FODs rotating at 15,000 rpm must be set close to the stabilizer within about 100 \mbox{$\mu$m}. Because of this severe positioning constraint at high-speed rotation, high accuracy of assembly and positioning are required in the drive system, and the mechanical margin of the setting is very narrow. To overcome this problem, we developed a new stabilizing method that can suppress the axial run-out while keeping a wide clearance margin between the disk and stabilizer by restricting airflow to the stabilizer.