INFORMATION RECORDING MEDIUM HAVING DOUBLE-LAYER STRUCTURE, AND INFORMATION REPRODUCING APPARATUS AND INFORMATION RECORDING AND REPRODUCING APPARATUS UTILIZING INFORMATION RECORDING MEDIUM HAVING DOUBLE-LAYER STRUCTURE
US6563782B1 · kind B1 · utility
6Cited by
8References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1387
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording medium comprises a double-layer structure comprised of a light transmitting layer for transmitting light and a light reflecting layer for reflecting light, The light transmitting layer has a data mark which comprises a unit of information to be reproduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.