Patent ID: 7986603
Filing Date: 2011-07-26
Classification: G11B

Abstract:
1. A holographic data storage (HDS) system comprising: a light source for generating a coherent light; beam-forming optics for forming the coherent light into a collimated object beam and a reference beam; holographic storage medium; a spatial light modulator (SLM) located in a path of the object beam from the beam-forming optics to the storage medium, the SLM having a number of pixels for encoding electronic data to be stored in the medium into the object beam; and wherein the SLM can modulate both the amplitude and phase of the light from every pixel on the on the SLM to generate a holographic image to be recorded in the medium, and wherein each pixel of the SLM comprises a plurality of phase shift elements, and wherein the plurality of pixels are controlled to independently modulate phase and magnitude of light modulated by the SLM.