Solid state holographic memory

Details Solid state holographic memory Solid state holographic memory

1999-06-07

2000-04-25

Mai, Son

Static information storage and retrieval

Information masking

Diffraction

365126, 359 28, 359 32, G11C 1304, G11C 1146

Patent

active

060551747

ABSTRACT:
A method and a compact apparatus to read shift-multiplexed holograms on a storage medium without the need for any lenses, and without the need for moving the storage medium. The shift-multiplexed holograms have centers at different locations. The apparatus can generate an array of diverging spherical waves of reference beams, each for illuminating one of the holograms. Each hologram is read as an image on a detector array by illuminating that hologram with a corresponding diverging spherical wave of reference beam. Different holograms can be read by illuminating the medium with a different diverging spherical reference beam. The diverging beams can be from an array of sources, or can be from switching one source.

REFERENCES:
patent: 5007690 (1991-04-01), Chern et al.
patent: 5754318 (1998-05-01), Agopian
patent: 5859808 (1999-01-01), Campbell et al.
patent: 5978112 (1999-11-01), Psaltis et al.
patent: 5995251 (1999-11-01), Hesselink et al.

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