发明名称 |
Optical storage apparatus and recording and reproducing method of optical storage medium |
摘要 |
A reproducing magnetic field correcting unit, a reproducing state is monitored while increasing a reproducing magnetic field by using a predetermined reproducing magnetic field as an initial value H1, and a reproducing magnetic field when a reproducible state is obtained is determined as an optimum magnetic field. A reproducing magnetic field obtained by adding a predetermined value to the reproducing magnetic field in the reproducible state is used as an optimum reproducing magnetic field. A change in reproducing magnetic field is started from the low magnetic field in which a predetermined value is subtracted from the initial value. A shoulder portion is certainly detected and the optimum magnetic field is set.
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申请公布号 |
US6324128(B1) |
申请公布日期 |
2001.11.27 |
申请号 |
US19970982326 |
申请日期 |
1997.12.02 |
申请人 |
FUJITSU LIMITED |
发明人 |
IKEDA TORU;YANAGI SHIGENORI |
分类号 |
G11B11/10;G11B11/105;G11B20/18;G11B27/36;(IPC1-7):G11B11/00 |
主分类号 |
G11B11/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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