Reflective holographic storage media with control information in underlying DVD reflective layer
US7724631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2007 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Oct 21, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24044
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A holographic storage media incorporates a holographic recording layer for storing holographic data and a DVD reflective layer for storing control information. The DVD reflective layer is positioned within the holographic storage media relative to the holographic recording layer to enable individual optical access to the holographic recording layer via a data laser light for processing the holographic data and individual optical access to the DVD reflective layer via an information laser light for processing the control information. The holographic recording layer and the DVD reflective layer may be physically separated by one or more intermediate reflective layers. The data laser light and the information laser light may differ in one or more optical characteristics. The holographic recording layer and the DVD reflective layer may be optically accessed by the respective laser lights through different light transparent faces of the holographic storage media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.