A holographic data storage system that includes a write head that includes a pixellated spatial light modulator and a separate or integral phase mask that varies the phase depending on the location in the phase mask that light passes through. The phase variation can be changed over time in a random,...http://www.google.es/patents/US8134771?utm_source=gb-gplus-sharePatente US8134771 - Spatial light modulators with changeable phase masks for use in holographic data storage
Spatial light modulators with changeable phase masks for use in holographic ...
