| 摘要 |
<p>AN OPTICAL DISC (1) INCLUDES A ROUND OPENING (2) AT THE CENTER OF THE OPTICAL DISC (1), AN ANNULAR RECORDING SECTION (3) CONFIGURED TO RECORD INFORMATION, AN ANNULAR SUPPORTING SECTION BETWEEN THE ROUND OPENING (2) AND THE ANNULAR RECORDING SECTION (3) AND CONFIGURED TO SUPPORT THE OPTICAL DISC (1), AND A SPOILER (R1) PROVIDED ON A NON-READ/WRITE SIDE OF THE ANNULAR RECORDING SECTION (3) AND CONFIGURED TO DISTURB THE FLOW FIELD INSIDE THE OPLICAL DISC (1) DRIVE WHEN THE OPTICAL DISC (1) IS ROTATING, THE SPOILER (R1) HAVING A CENTERLINE AVERAGE ROUGHNESS BETWEEN 2 ?m AND 10 ?m, A THICKNESS BETWEEN 0.02 MM AND 0.05 MM, AN AREA OCCUPYING AT LEAST 5% OF THE NON-READ/WRITE SIDE.THE FLOW FIELD SO DISTURBED CHANGES FROM A LAMINAR SUITE TO A TURBULENT STATE AND THUS THE READ/WRITE CHARACTERISTICS OF THE DISC IS IMPROVED DUE TO LOWER AIR RESISTANCE EXPERIENCED BY THE ROTATING DISC.</p> |
