A plurality of reflective diffusing holographic memory elements (16) is positioned on a memory plate (14). An array (24) of detectors (22) faces at least one of the memory elements. A laser (26) illuminates the selected memory element and the data stored therein is reflected onto the array for reading....http://www.google.ca/patents/US5007690?utm_source=gb-gplus-sharePatent US5007690 - Holographic data storage and retrieval system
