Multilayer recordable optical medium with fluorescent reading
US6721257B2 · kind B2 · utility
3Cited by
2References
57Claims
0Family size
Inventors
Key dates
| Filing date | Jun 4, 2001 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Dec 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/24624
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a multilayer recordable optical medium, each recording layer includes a luminophore that fluoresces under reading laser light and a quencher capable of quenching the luminophore fluorescence. Initially, the luminophore and the quencher are not intermixed, so that the default state of the luminophore is fluorescent. During writing, focused writing radiation heats a spot in the medium so as to cause the luminophore and the quencher to be intermixed, thereby quenching the fluorescence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.