发明名称 |
INFORMATION RECORDING MEDIUM, AND METHOD AND APPARATUS FOR RECORDING A SIGNAL THEREON |
摘要 |
A disc-shaped information recording medium includes a laminate of recording layers on and from which an information signal can be optically recorded and reproduced from one side of the medium. Data areas are provided in the recording layers, respectively. The information signal can be recorded on and reproduced from the data areas while a laser beam emitted from an optical pickup is applied to the data areas. Optical recording test areas are provided in the recording layers, respectively. A test signal can be recorded on and reproduced from the optical recording test areas to decide optimum power values of the laser beam for signal recording. The test areas are out of overlap as viewed in a direction of propagation of the laser beam.
|
申请公布号 |
US2012057442(A1) |
申请公布日期 |
2012.03.08 |
申请号 |
US201113294611 |
申请日期 |
2011.11.11 |
申请人 |
UEKI YASUHIRO;VICTOR COMPANY OF JAPAN, LTD. |
发明人 |
UEKI YASUHIRO |
分类号 |
G11B7/126;G11B7/00;G11B7/0045;G11B7/007;G11B7/085;G11B7/125;G11B7/24;G11B20/12 |
主分类号 |
G11B7/126 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|