发明名称 |
OPTICAL INFORMATION MEDIUM |
摘要 |
PROBLEM TO BE SOLVED: To suppress the error rate of a data signal low by eliminating a reading error caused by the difference of an optical condition due to the existence of a land pre-pit showing address information in optically reading a recorded signal. SOLUTION: The shape of a groove-shaped tracking guide 3 is made to be different from the other part in a part adjacent to the land pre-pit 6 provided on a land 8 showing the address information. Concretely, the depth or width of the tracking guide 3 of the part adjacent to the land pre-pit 6 is changed. Thus, the difference of the optical condition due to the existence of the land pre-pit 6 is adjusted and modified. The land pre-pit 6 is also offset from the center of the land 8 to the inner peripheral side of a light-transmitting substrate 1. |
申请公布号 |
JP2002157789(A) |
申请公布日期 |
2002.05.31 |
申请号 |
JP20000350825 |
申请日期 |
2000.11.17 |
申请人 |
TAIYO YUDEN CO LTD |
发明人 |
NEGISHI MAKOTO;OKITSU ISAO;ISHIKAWA TOMOSHI;FUJII TORU |
分类号 |
G11B7/24;G11B7/0045;G11B7/007 |
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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