Optical recording medium
US7826333B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2005 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Mar 25, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/24324
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium has a plurality of information layers which are placed between a substrate and an optically transparent cover layer with optically transparent spacer layers interposed between the information layers. From among the plurality of information layers, the information layer excluding the information layer arranged closest to the substrate and the information layer adjacent to the information layer closest to the substrate has asymmetrical reflection characteristics in which reflectance on the substrate side when light incident from the substrate side is reflected on the information layer toward the substrate side is lower than the reflectance on the cover layer side when light incident from the cover layer side is reflected on the information layer toward the cover layer side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.