发明申请
US20050163008A1 Laser power adjustment method and optical recording and reproduction apparatus
有权
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基本信息:
- 专利标题: Laser power adjustment method and optical recording and reproduction apparatus
- 专利标题(中):激光功率调节方法和光学记录再生装置
- 申请号:US11029381 申请日:2005-01-06
- 公开(公告)号:US20050163008A1 公开(公告)日:2005-07-28
- 发明人: Noboru Mamiya , Ken Hirose , Kenji Nakao
- 申请人: Noboru Mamiya , Ken Hirose , Kenji Nakao
- 专利权人: SANYO ELECTRIC CO., LTD.
- 当前专利权人: SANYO ELECTRIC CO., LTD.
- 优先权: JP2004-14983(P) 20040122
- 主分类号: G11B7/0045
- IPC分类号: G11B7/0045 ; G11B7/125 ; G11B5/09 ; G11B7/00
摘要:
In order to set optimum laser power for a disk smoothly and appropriately with a small number of times of test writing, an integrated value Sn is obtained from each kind of laser power Pwn set for the test writing and the modulation factor m(Pwn) of a reflection light intensity obtained through the test writing with the laser power Pwn using an expression “Sn=m(Pwn)×Pwn2”, laser power Pwth is obtained at which the modulation factor m(Pwn) becomes zero when relational characteristics of the integrated value Sn and the laser power Pwn are linearly approximated, and optimum laser power Pw is set based on the laser power Pwth. Here, the optimum laser power Pw is obtained from the target γ value of the disk using an expression “Pw=Pwth×{1+1/(γ+1)}”. The target γ value is obtained from an ADIP of the disk.
摘要(中):
为了通过少量的测试写入平滑适当地设置用于盘的最佳激光功率,从针对测试写入设置的每种激光功率Pwn和调制因子m(Pwn)获得积分值Sn 通过使用表达式“Sn = m(Pwn)×Pwn <2>”的激光功率Pwn的测试写入获得的反射光强度,获得激光功率Pwth,其中调制因子m(Pwn)变为 积分值Sn和激光功率Pwn的关系特性被线性近似为零,并且基于激光功率Pwth设置最佳激光功率Pw。 这里,使用表达式“Pw = Pwthx {1 + 1 /(γ+ 1”)从盘的目标伽马值获得最佳激光功率Pw。目标伽马值是从盘的ADIP获得的。
公开/授权文献:
IPC结构图谱:
G | 物理 |
--G11 | 信息存储 |
----G11B | 基于记录载体和换能器之间的相对运动而实现的信息存储 |
------G11B7/00 | 用光学方法,例如,用光辐射的热射束记录用低功率光束重现的;为此所用的记录载体 |
--------G11B7/002 | .按载体形状区分的记录、重现或抹除系统 |
----------G11B7/0045 | ..记录 |