公开(公告)号：US20090147660A1

公开(公告)日：2009-06-11

申请号：US12272179

申请日：2008-11-17

申请人： Kimihiro SAITO ,  Hirotaka MIYAMOTO ,  Toshihiro HORIGOME

发明人： Kimihiro SAITO ,  Hirotaka MIYAMOTO ,  Toshihiro HORIGOME

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/00452 ,  G11B7/0053 ,  G11B7/00736 ,  G11B7/0079 ,  G11B7/0938 ,  G11B2007/0013

摘要： An optical disc apparatus can make the focus of an information light beam converged by an objective lens agree with a target track of a target mark layer of an optical disc by appropriately predefining the distance between the focus of a servo light beam and that of the information light beam with regard to the direction of the thickness and a radial direction of the optical disc by means of the optical pickup of the apparatus and then operating for focus control and tracking control of the objective lens so as to make focus of the servo light beam converged by the objective lens agree with a reference track of a reference mark layer.

摘要翻译： 光盘装置可以通过适当地预先定义伺服光束的焦点与信息的焦点之间的距离，使由物镜会聚的信息光束的焦点与光盘的目标标记层的目标轨迹一致 通过装置的光学拾取器相对于厚度方向和光盘的径向方向的光束，然后操作用于物镜的聚焦控制和跟踪控制，以便使伺服光束的焦点 由物镜会聚，与参考标记层的参考轨道一致。

公开(公告)号：US20090201776A1

公开(公告)日：2009-08-13

申请号：US12351128

申请日：2009-01-09

申请人： Toshihiro HORIGOME

发明人： Toshihiro HORIGOME

IPC分类号： G11B7/00

CPC分类号： G11B20/10037 ,  G11B20/10203 ,  G11B20/10222 ,  G11B20/10481 ,  G11B2007/0013 ,  G11B2220/235 ,  G11B2220/2541

摘要： When recording recording information by forming on a recording medium a recording mark whose mark length is an integral multiple of the reference mark length according to a recording signal generated from a recording information signal, this method performs a process of: generating, after recording compensation recording information on the recording medium, a reproduction signal by reading out the compensation recording information; generating from the reproduction signal a reproduction clock whose cycle corresponds to the reference mark length; setting a signal level suitable for binarization determination of the reproduction signal as a distribution reference level, according to the difference in variation between white and black levels of the reproduction signal; and calculating the recording correction value for correcting the compensation recording signal, so that the reproduction signal becomes closer to the distribution reference level around a target cross timing determined based on the reproduction clock.

摘要翻译： 当通过在记录介质上记录标记长度是参考标记长度的整数倍的记录标记来记录记录信息时，该记录信息根据从记录信息信号产生的记录信号，执行以下处理：在记录补偿记录之后 关于记录介质的信息，通过读出补偿记录信息的再现信号; 从再现信号产生其周期对应于参考标记长度的再现时钟; 根据再现信号的白电平和黑电平之间的差异，设置适合于再现信号的二值化确定的信号电平作为分布参考电平; 以及计算用于校正补偿记录信号的记录校正值，使得再现信号变得更靠近基于再现时钟确定的目标交叉定时附近的分布参考水平。