Multilayer optical recording medium
US8518514B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2011 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Oct 20, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Simple design of a multilayer optical recording medium is achieved while suppressing interlayer crosstalk and confocal crosstalk in the multilayer optical recording medium. Simple recording and reading control by a recording and reading unit is also achieved. The multilayer optical recording medium includes at least three or more recording and reading layers deposited one above the other with intermediate layers interposed therebetween, and information can be read by light irradiation from the layers. The intermediate layers have film thicknesses of two types or less, and all the recording and reading layers except the recording and reading layer farthest from a light incident surface have substantially the same optical constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.