公开(公告)号：US20080137512A1

公开(公告)日：2008-06-12

申请号：US11783606

申请日：2007-04-10

申请人： Jong-chul Chol ,  Taek-seong Jeong ,  Moon-Il Jung

发明人： Jong-chul Chol ,  Taek-seong Jeong ,  Moon-Il Jung

IPC分类号： G11B7/00

CPC分类号： G11B7/083

摘要： Provided are a holographic information recording/reproducing apparatus in which positions of books can be accurately ascertained in a holographic recording medium, and a method for seeking books in the same. The apparatus includes an aperture plate disposed in an optical path of a signal beam reproduced from a reference beam that is incident on a holographic recording medium, and having an opening for restricting a width of the signal beam; one or more photodetectors installed on a surface of the aperture plate along a circumference of the opening; and a book position calculator to calculate positions of one or more books from the output of the photodetectors, wherein a cross-section of the reference beam incident on the holographic recording medium is larger than the size of the one or more books.

摘要翻译： 提供了一种全息信息记录/再现装置，其中可以在全息记录介质中准确地确定书籍的位置，以及用于寻找其中的书籍的方法。 该装置包括一个孔板，设置在从入射到全息记录介质上的参考光束再现的信号光束的光路中，并具有用于限制信号光束宽度的开口; 一个或多个光电探测器沿开口的圆周安装在孔板的表面上; 以及书位置计算器，用于从光电检测器的输出计算一本或多本书的位置，其中入射在全息记录介质上的参考光束的横截面大于一个或多个书的大小。