发明名称 |
Phase-change optical disc recording method and apparatus, and information recording apparatus and recording pre-compensation method |
摘要 |
A trial writing operation is performed on a phase-change optical disc using write and erase light-emitting powers, which together are varied according to predetermined variation ratios respectively. Signals relevant to said trial writing operation are reproduced from said disc. Optimum ones of the write and erase light-emitting powers are determined using the thus-reproduced signals. The predetermined variation ratios for the write and erase light-emitting powers may be the same as each other. Alternatively, the trial writing operation may be performed on a phase-change optical disc using write and erase light-emitting powers which are individually varied according to predetermined variation ratios respectively.
|
申请公布号 |
US5956313(A) |
申请公布日期 |
1999.09.21 |
申请号 |
US19970811713 |
申请日期 |
1997.03.05 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
MAEGAWA, HIROSHI;AOKI, IKUO |
分类号 |
G11B7/0045;G11B7/0055;G11B7/006;G11B7/125;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/0045 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|