Multi-stack rolled-up information carrier
US7203152B2 · kind B2 · utility
1Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2004 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Apr 20, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/25
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to an information carrier for scanning information by means of an optical beam having a wave-length. The information carrier comprises a central hole (11) and at least two information stacks (13, 14) rolled up around said hole. Each information stack comprises a first electrode, a second electrode and a material whose optical properties at the wavelength of the optical beam depend on a potential difference applied between the first and second electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.