Patent ID: 7710624
Filing Date: 2010-05-04
Classification: G02B,G03H,G11B

Abstract:
1. A holographic system comprising: a photosensitive storage medium configured to holographically-store information; a source of a coherent light beam; and an optical steering subsystem for directing said coherent light beam to said storage medium, comprising: at least one beam-shaping device positioned in the path of one or more coherent light beams traveling through said optical steering subsystem, said at least one beam-shaping device configured to shape the coherent light beam into a substantially diffraction noise-free coherent light beam having predetermined dimensions and a continuous light beam profile of distinct intensity zones; wherein said beam-shaping device comprises: a holographic optical element having a hologram stored therein, wherein said holographic optical element is configured to form said shaped diffraction noise-free coherent light beam having predetermined dimensions and a continuous beam profile having a plurality of distinct, radially-successive circumferential intensity zones.