利索-全球专利检索

  1. 登录
  2. 注册
发明公开
EP0883114A2 Device for reading from and/or writing to optical recording media 失效
一种用于读和/或记录的光记录介质上

Device for reading from and/or writing to optical recording media
摘要：
The present invention relates to a device for reading from and/or writing to optical recording media (4), which has a tracking unit (13), a four-quadrant detector (5), two summation points (15, 16) and a phase comparator (20) for tracking in accordance with the differential phase detection method, and also two variable delay elements (26A, 26B) which can be set by a control unit (24).
The object of the present invention is to propose a device of this type which has the best possible compensation of the error in the track error signal (DPD-TE) and thus in the tracking signal, which error is caused on account of the lens movement.
For this purpose, according to the invention an interference signal generating unit (22) is present whose output is connected to the tracking unit (13) and to a first input of the control unit (24), the second input of which is connected to the output of the phase comparator (20).
The present invention is suitable for devices for reading from and/or writing to optical recording media, such as CD, CDI, CD-ROM, DVD, CDR, magneto-optical recording media and the like.
摘要（中）：

本发明涉及一种设备，用于读和/或写光记录介质（4），其具有跟踪单元（13），一个四象限检测器（5），两个求和点（15，16）和一个 相位比较器（20），用于在雅舞的差分相位检测方法进行跟踪，并因此两个可变延迟元件（26A，26B）有什么可以由控制单元（24）进行设置。 本发明的目的是在跟踪信号，该信号是考虑到透镜移动引起的误差，提出这种类型已经在轨道误差信号（DPD-TE）的误差的最佳可能补偿的设备，因此 ， 为了这个目的，雅丁到干扰信号产生单元的发明（22）是本其输出被连接到跟踪单元（13）和至所述控制单元（24），其连接到的所有第二输入的第一输入端 相位比较器的输出（20）。 本发明是适合于设备用于读和/或写记录的光学介质，：如CD，CDI，CD-ROM，DVD，CDR，磁 - 光记录介质等。

公开/授权文献
信息查询
Global Dossier Espacenet
0/0