A hologram recording apparatus, a hologram recording method and a hologram recording medium reduce noise components generated by a phase modulation type spatial light modulator, thus permitting improved integrity of data to be achieved. A light beam whose diffraction state has been controlled by a diffraction...http://www.google.ca/patents/US7085028?utm_source=gb-gplus-sharePatent US7085028 - Hologram recording apparatus, hologram recording method, and hologram recording medium
