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One approach to volume storage is bit oriented, similar to magnetic memory but higher in density. The second approach, which concerns us here, is essentially holographic in nature; each data write or read is distributed throughout the material volume on the basis of angle multiplexing or other schemes consistent with the principles of holography. A variety of addressing schemes may be contemplated, but their practicality depends to a large degree on the interface devices available. In an earlier paper(2), we discussed a recently demonstrated family of dynamic holograms which offer a possible basis for not just one but several programmable diffractive devices required for various data input/output schemes. Dynamic fixed holograms are not themselves erasable storage materials, but rather programmable diffractive elements which complement holographic storage materials by providing interferometric interfacing tools. In this note, we suggest that such dynamic holograms may be particularly adapted for integration with thin planar storage materials to achieve high data storage densities approaching those of bulk materials, but with a much more flexible geometry and optical readin/readout architecture |
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Holograms
Holography
Liquid crystals
Diffraction
Diffraction gratings
Data storage
Holographic interferometry
