Optical data storage disc
US6160789A · kind A · utility
26Cited by
10References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1998 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Oct 26, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical data storage disc having a first component disc formed over one side with a pattern of indentations defining digital data, the indented side of the first component disc being provided with a reflective coating, and a second component disc being bonded to the indented side of the first component disc. The second component disc carries a surface relief pattern having continuous variations in depth over a range of depths, and defining a holographic, or other optically variable, image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.