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    • 7. 发明申请
    • Disk drive
    • 磁盘驱动器
    • US20050152247A1
    • 2005-07-14
    • US10501331
    • 2003-01-17
    • Shigekazu MinechikaTadashi OkajimaTakanobu Hisamitsu
    • Shigekazu MinechikaTadashi OkajimaTakanobu Hisamitsu
    • G11B7/1263G11B7/005G11B19/28G11B5/09
    • G11B7/1267G11B7/005G11B11/10515G11B11/10595
    • A disk apparatus includes a DSP (Digital Signal Processor), and the DSP performs a test writing and a test reading on a magneto-optical disk rotated in a ZCLV system to obtain an optimal reproduction laser power value (reference reproduction laser power value) “Pt” at a linear velocity of 30 Mbps in the ZCLV system. Next, by use of a relational expression between a power coefficient and a linear velocity, a linear velocity coefficient “αx” as an optimal reproduction laser power value at a desired linear velocity (zone) “Vx” in a ZCAV system is obtained when the reference reproduction laser power value is multiplied. Then, the optimal reproduction laser power value at the zone in the ZCAV system is obtained by multiplying the reference reproduction laser power value “Pt” by the linear velocity coefficient “αx”.
    • 磁盘装置包括DSP(数字信号处理器),并且DSP在以ZCLV系统旋转的磁光盘上执行测试写入和测试读取以获得最佳再现激光功率值(参考再现激光功率值)“ Pt“在ZCLV系统中的线速度为30Mbps。 接下来,通过使用功率系数和线速度之间的关系表达式,在ZCAV系统中在期望的线速度(区域)“Vx”处的线速度系数“alphax”作为最佳再现激光功率值获得,当 参考再生激光功率值相乘。 然后,通过将参考再现激光功率值“Pt”乘以线速度系数“alphax”来获得ZCAV系统中的区域处的最佳再现激光功率值。