公开(公告)号：US20050237896A1

公开(公告)日：2005-10-27

申请号：US10522342

申请日：2003-07-23

申请人： Akihiro Tachibana ,  Satoru Tanaka ,  Yoshihisa Itoh ,  Yoshihisa Kubota ,  Kazuo Kuroda ,  Satoshi Suguira

发明人： Akihiro Tachibana ,  Satoru Tanaka ,  Yoshihisa Itoh ,  Yoshihisa Kubota ,  Kazuo Kuroda ,  Satoshi Suguira

IPC分类号： G11B7/0065 ,  G11B7/09 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/0938 ,  G11B7/0065 ,  G11B7/083 ,  G11B7/1362

摘要： A holographic recording and reproducing apparatus comprises: a pickup for moving an objective lens that focuses a coherent light beam along a recording track on a holographic recording medium and for detecting reflected light from the recording track to perform focus- and tracking-servo control; a relative velocity determination unit for determining a relative velocity of a converging position of the objective lens with respect to the holographic recording medium; a driving unit for changing a relative position of the objective lens with respect to an optical path of the coherent light beam so as to make the relative velocity fall within a predetermined range at least during a predetermined period; and a control unit for performing recording or reproduction for a recording layer during the predetermined period. The holographic recording medium includes a plurality of markers used for positioning an optical interference pattern of the coherent light beam.

摘要翻译： 一种全息记录和再现装置，包括：拾取器，用于移动物镜，沿着记录轨道将相干光束聚焦在全息记录介质上，并用于检测来自记录轨道的反射光，以执行对焦和跟踪伺服控制; 相对速度确定单元，用于确定物镜相对于全息记录介质的会聚位置的相对速度; 驱动单元，用于相对于所述相干光束的光路改变所述物镜的相对位置，以使所述相对速度至少在预定时段期间落在预定范围内; 以及控制单元，用于在预定时段期间执行记录层的记录或再现。 全息记录介质包括用于定位相干光束的光学干涉图案的多个标记。