Method for holographic data storage and retrieval
US6064586A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Dec 31, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.