发明名称 |
Information recording carrier and method of reproducing the same |
摘要 |
An information recording carrier according to one embodiment has minute pattern including plural grooves or lands formed to be substantially in parallel and adjacent each other and comprises a supporting body having the minute pattern, a recording layer formed on the minute pattern formed on the supporting layer and a light transmission layer formed on the recording layer. The minute pattern is formed under a relation of P<λ/NA, where a pitch of each groove or land is P, a wavelength of a laser beam is λ and a numerical aperture of an objective lens is NA. The plural grooves or lands have at least a wobbling region and data is recorded wobblingly in the wobbling region by frequency shift modulation. A phase relation between a high frequency portion and a low frequency portion composing the frequency shift modulation is ±(&pgr;/20.5) to ±(&pgr;/0.75). The data is also recorded wobblingly in the wobbling region by bi-phase modulation.
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申请公布号 |
US7876669(B2) |
申请公布日期 |
2011.01.25 |
申请号 |
US20080153497 |
申请日期 |
2008.05.20 |
申请人 |
VICTOR COMPANY OF JAPAN, LIMITED |
发明人 |
KONDO TETSUYA |
分类号 |
G11B7/24;G11B7/005;G11B7/007;G11B20/14;G11B27/19;G11B27/24 |
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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