Method for holographic storage

Details Method for holographic storage Method for holographic storage

1997-05-16

1999-12-21

Spyrou, Cassandra

Optical: systems and elements

Holographic system or element

Having defined page composer

359 20, 359 3, 359 7, 365125, G02B 532, G03H 102, G11C 1146

Patent

active

060056932

ABSTRACT:
The present invention is a method for optical data storage which compensates for deterministic variations. The method comprises writing a two-dimensional image comprising a plurality of pixels into a recording medium while varying the exposure of individual ON pixels during the recording of the image to expose the weaker pixels more than brighter pixels.

REFERENCES:
G. W. Burr et al., "Modulation Coding for Pixel-matched Holographic Data Storage", Optics Letters, vol. 22, No. 9, May 1, 1997, pp. 639-641.
S. Campbell et al., "Absorption Effects in Photoefractive Volume-holographic Memory Systems", Part I, Beam Depletion, Journal of the Optical Society of America, vol 13, No. 10, Oct. 1996, pp. 2209-2217.
I. okgor et al., "Multilayer Disk Recording Using 2-photon Absorption and the Numerical Simulation of the Recording Process", 1997 Optical Data Storage Conference Digest, Apr. 7-9, 1997, pp. 54-59.
J. P. Huignard et al., "Coherent Selective Erasure of Superimposed Volume Holograms in LiNbO.sub.3 ", Applied Physics Letters, vol. 26, No. 5, Mar. 1, 1975, pp. 256-258.
H. Sasaki et al., "Gray-scale Fidelity in Volume-multiplexed Photorefractive Memory", Optics Letters, vol. 18, No. 16, Aug. 15, 1993, pp. 1358-1360.

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