公开(公告)号：US20090296561A1

公开(公告)日：2009-12-03

申请号：US11721539

申请日：2005-12-13

申请人： Johannes Hendrikus Maria Spruit ,  Hubert Cecile Francois Martens ,  Sjoerd Stallinga ,  Pierre Hermanus Woerlee

发明人： Johannes Hendrikus Maria Spruit ,  Hubert Cecile Francois Martens ,  Sjoerd Stallinga ,  Pierre Hermanus Woerlee

IPC分类号： G11B7/00

CPC分类号： G11B7/24038 ,  G11B7/0948 ,  G11B7/13

摘要： The present invention relates to a detector configuration, pickup device and driving device for multi-layer record carriers, wherein main beam detector means and two pairs of side-beam detector means disposed on opposite sides of the main beam detector means are provided for suppressing crosstalk effects. As an example, the two three-spot systems obtained can be used for focus error signals and tracking error signals, respectively, wherein satellite spots can be controlled to have a desired fringe pattern either in-phase or anti-phase with that of the main beam. Besides the reduction of focusing and tracking errors, the above measure allows to reduce spacer layer thickness.

摘要翻译： 本发明涉及用于多层记录载体的检测器配置，拾取装置和驱动装置，其中设置主波束检测装置和设置在主波束检测装置的相对侧上的两对侧光检测装置用于抑制串扰 效果。 作为示例，所获得的两个三点系统可以分别用于聚焦误差信号和跟踪误差信号，其中卫星点可以被控制成具有与主干同步或反相的期望的条纹图案 光束。 除了减少聚焦和跟踪误差之外，上述措施可以减少间隔层的厚度。