Optical data storage disc with a visible holographic image and method for its manufacture
US6011767A · kind A · utility
7Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/263
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical data storage disc (e.g. a compact disc) carries a digital recording and also carries a holographic image. The holographic recording occupies an area separate from the area occupied by the digital recording, for example the holographic recording may be positioned in an annular area encircling the central area occupied by the digital recording.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.