发明名称 |
INFORMATION STORAGE EVALUATION METHOD, INFORMATION STORAGE MEDIUM EVALUATION APPARATUS, INFORMATION STORAGE MEDIUM, INFORMATION RECORDING APPARATUS, INFORMATION REPRODUCING METHOD, AND INFORMATION RECORDING METHOD |
摘要 |
PROBLEM TO BE SOLVED: To provide an information storage medium on which a high-quality wobble track is formed by a correct performance evaluation of the wobble signal. SOLUTION: The information storage medium (D1) includes an information storage area (D12) for storing information and a wobble track (D13) which a track for guiding an optical beam on the information storage area and which is made to wobble corresponding to a frequency whose phase is modulated in prescribed timing in order to make predetermined information to be reflected on the track. The wobble track is formed so that a reproduced signal corresponding to the wobble track, which is obtained from the return light of light beam which is made to irradiate the wobble track is double multiplied and a result of evaluating this double multiplied reproduced signal based the frequency characteristic of the double multiplied reproduced signal satisfies prescribed evaluation indexes. COPYRIGHT: (C)2005,JPO&NCIPI
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申请公布号 |
JP2004280878(A) |
申请公布日期 |
2004.10.07 |
申请号 |
JP20030067111 |
申请日期 |
2003.03.12 |
申请人 |
TOSHIBA CORP |
发明人 |
OGAWA AKITO;NAGAI YUJI |
分类号 |
G11B7/007;G11B7/24;G11B7/26;(IPC1-7):G11B7/26 |
主分类号 |
G11B7/007 |
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