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SPATIAL LIGHT MODULATORS WITH CHANGEABLE PHASE MASKS FOR USE IN HOLOGRAPHIC DATA STORAGE

  • US 20070247687A1
  • Filed: 04/24/2007
  • Published: 10/25/2007
  • Est. Priority Date: 04/24/2006
  • Status: Active Grant
First Claim
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1. A write head for a holographic data storage system, the write head comprising:

  • a spatial light modulator that is arranged into an array of pixels that can each separately modulate light that is directed toward the spatial light modulator; and

    a phase mask that is capable of varying the phase of light passing therethrough, the phase variation being dependent on the particular portion of the phase mask that the light passes through;

    wherein the phase variation of at least a portion of the phase mask can be changed over time.

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