发明名称 |
Test recording method and optical information recording/reproducing apparatus for determining an optimum power of the light output from a light source in erasing pieces of information recorded on a land and groove of a recording medium |
摘要 |
A test recording method is provided to determine an optimum power of a light output from a light source in erasing pieces of information recorded on a land and a groove of a recording medium. A predetermined signal is recorded on a predetermined track of the medium. Data on a track adjacent to the track where the signal is recorded is erased with different erasing powers. The signal recorded on the track is reproduced to detect a reproduction signal. An optimum erasing power is set on the basis of the reproduction signal and the different erasing powers.
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申请公布号 |
US5949747(A) |
申请公布日期 |
1999.09.07 |
申请号 |
US19970868070 |
申请日期 |
1997.06.03 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
MIYASHITA, AKIRA;ASHINUMA, TAKAAKI |
分类号 |
G11B7/00;G11B7/0045;G11B7/0055;G11B7/007;G11B7/125;G11B11/105;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/00 |
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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