发明名称 |
Head displacement measuring method and apparatus and data recording/reproducing method and apparatus |
摘要 |
In a head displacement measuring method, prior to actual data recording or data reproduction, either one of the recording head and the reproducing head is wobbled, and the test data is recorded in the disk-shaped recording medium by the recording head. Then, the test data is reproduced from the test data by the reproducing head, and displacement between the recording head and the reproducing head is detected on the basis of the reproduced test data. Thus, the displacement may be detected more easily with higher precision than with the conventional optical detecting method.
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申请公布号 |
US5654842(A) |
申请公布日期 |
1997.08.05 |
申请号 |
US19950519405 |
申请日期 |
1995.08.25 |
申请人 |
SONY CORPORATION |
发明人 |
TAKEDA, TORU;SEKO, SATORU;ISHIDA, TAKEHISA |
分类号 |
G11B5/012;G11B5/55;G11B5/596;G11B20/10;G11B27/36;(IPC1-7):G11B5/596 |
主分类号 |
G11B5/012 |
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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