![光学数据记录介质的读取设备和读取方法](/CN/2010/1/103/images/201010518027.jpg)
基本信息:
- 专利标题: 光学数据记录介质的读取设备和读取方法
- 专利标题(英):Reading device and reading method for an optical data recording medium
- 申请号:CN201010518027.1 申请日:2007-05-31
- 公开(公告)号:CN101950568A 公开(公告)日:2011-01-19
- 发明人: 中村敦史 , 宫川直康
- 申请人: 松下电器产业株式会社
- 申请人地址: 日本大阪府
- 专利权人: 松下电器产业株式会社
- 当前专利权人: 松下电器产业株式会社
- 当前专利权人地址: 日本大阪府
- 代理机构: 中科专利商标代理有限责任公司
- 代理人: 王玮
- 优先权: 2006-162295 2006.06.12 JP
- 分案原申请号: 2007800216911 2007.05.31
- 主分类号: G11B7/005
- IPC分类号: G11B7/005 ; G11B7/125 ; G11B19/04 ; G11B19/28
A reading devices suppresses deterioration of the recording marks caused by increasing the output laser power to compensate for a drop in the S/N ratio when reading at a high speed information recorded to a high density recording medium. To read information recorded to an optical data recording medium that is written and read using a laser beam output from a semiconductor laser, the reading method modulates a high frequency current on the drive current of the semiconductor laser to output the laser beam, and changes the light modulation rate according to the selected linear velocity used for reading. The light modulation rate is the ratio Pp/Pave between the peak power Pp and the average read power Pave of the light intensity of the high frequency modulated laser beam.
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 |
----------G11B7/005 | ..重现 |