发明名称 |
Optical recording medium for land-and-groove recording system |
摘要 |
An optical recording medium in which information can be recorded in tracks formed by both lands and grooves provided between lands, and rows of prepits corresponding to preformat information in both adjacent lands and grooves are formed by deviating in the circumferential direction. Counting grooves for counting tracks are formed at both sides of the row of prepits for the land, the prepit for the groove has a depth or width different from that of the groove, the counting groove has a depth or width different from that of the groove, and the prepit for the land is formed narrower and/or shallower than the counting groove.
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申请公布号 |
US5978327(A) |
申请公布日期 |
1999.11.02 |
申请号 |
US19970804897 |
申请日期 |
1997.02.24 |
申请人 |
FUJITSU LIMITED |
发明人 |
KURODA, SUMIO;MORIBE, MINEO;IIDA, KOICHI |
分类号 |
G11B7/24;G11B7/007;G11B7/085;G11B7/09;G11B11/105;(IPC1-7):G11B7/095 |
主分类号 |
G11B7/24 |
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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