Optical recording medium, optical pickup and optical recording and/or reproducing apparatus
US6600714B2 · kind B2 · utility
6Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2001 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | May 22, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/13727
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium to which light for recording and/or reproducing is emitted, comprising one or a plurality of inorganic deelectric layers provided at an incident side to which light from an optical system is converged, and an amplitude transmittance, which is a ratio of the light reached to a recording layer in the optical recording medium to said converged light passed through outer circumference area of said optical system, being equal or greater than 30%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.