Method and apparatus for recording/reproducing optical...

Details Method and apparatus for recording/reproducing optical... Method and apparatus for recording/reproducing optical...

2005-05-17

2005-05-17

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Holographic system or element

Hardware for producing a hologram

C359S900000, C365S125000, C365S216000

Reexamination Certificate

active

06894816

ABSTRACT:
In a holographic digital data storage system, holographic page data has at least two concentric patterns with the optical information arranged within an outermost pattern of at least two concentric patterns. Since at least two concentric patterns in the holographic page data are deformed into at least two elliptic patterns in the diffracted beam caused by irradiation of the reference beam, at least two elliptic patterns are extracted from the diffracted beam and then at least two elliptic patterns are estimated to generate at least two estimated concentric patterns. A compensated vector between said at least two elliptic patterns and said at least two estimated concentric patterns is used to reconstruct the optical information from the diffracted beam.

REFERENCES:
patent: 5777760 (1998-07-01), Hays et al.
patent: 6232045 (2001-05-01), Jacobowitz et al.
patent: 0263733 (2002-02-01), None
patent: 0180229 (2001-10-01), None

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