Holographic correlator for data and metadata search
US7337168B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2005 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Feb 5, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99933
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
System and method for content-addressable search of holographically stored data primarily optimized with respect to search performance. A search is performed, by a holographic correlator system, on a structured representation of original data, stored in a holographic data storage medium. In a first aspect, orthogonal phase encoding of both data storage and search pages provides improvement of correlator system signal to noise ratio and dynamic range. In a second aspect, correlator incorporates heterodyne detection of a plurality of correlation signals, obtained by modulation and amplification thereof by a plurality of frequency-shifted reference beams. In a third aspect, the invention provides a method whereby multiple searches can simultaneously interrogate a single data storage location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.