Method for holographic data storage and retrieval

Details Method for holographic data storage and retrieval Method for holographic data storage and retrieval

1998-12-31

2000-05-16

Le, Vu A.

Static information storage and retrieval

Information masking

Diffraction

365216, 359 22, 359 24, G03H 126

Patent

active

060645865

ABSTRACT:
A method for holographic data storage comprises the step of formatting a page with calibration marks as well as data patterns representing data. The page is then stored in a holographic storage medium. A method for holographic data retrieval comprises the step of detecting locations of the calibration marks. A mathematical function is fitted to the locations, and the function is used to compensate for distortion in the detected image of the page. In the preferred embodiment, the calibration marks are also used to generate an inverse point spread function that is used to digitally sharpen the detected image of the page. In the preferred embodiment, the data patterns are dispersed throughout the page by an interleaving algorithm, so that subsequent data patterns are not stored consecutively in the page.

REFERENCES:
patent: 4149269 (1979-04-01), Abe et al.
patent: 5265226 (1993-11-01), Ueda
patent: 5511058 (1996-04-01), Visel et al.
patent: 5519517 (1996-05-01), Redfield et al.
patent: 5812288 (1998-09-01), Curtis et al.
patent: 5859808 (1999-01-01), Campbell et al.
patent: 5877875 (1999-03-01), Reis et al.

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