Patent ID: 6154432
Filing Date: 2000-11-28
Classification: G11B

Abstract:
An optical storage system comprising:an optical storage means for holographic storage of data in a plurality of data storage dots, said optical storage means comprising a storage medium being writable, readable and erasable and said data being stored in the form of a diffraction pattern in each said data storage dot;a first source of coherent radiation for writing said data in said optical storage means;a second source of coherent radiation for reading said data from said optical storage means;means for erasing said data from said optical storage means;an optical head for directing said coherent radiation for writing, said coherent radiation for reading and said means for erasing to said optical storage means, said optical head including means for modulating said first source of coherent radiation for forming said diffraction pattern; anda control means for controlling the optical head to write, read and erase said data; and signal processing means for encoding the coherent radiation for writing and decoding the coherent radiation for reading.