Optical recording elements having recording layers containing cationic azo dyes
US5547727A · kind A · utility
4Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1994 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Dec 13, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording element having a transparent substrate and on the surface of said substrate, a recording layer and a light reflecting layer wherein recording layer comprises a dye selected from the group consisting of cationic azocyanine dyes and mixtures of such dyes and the unrecorded layer is such that the real part of the refractive index (N) at 780 nm is at least 1.8 and the imaginary part (k) is 0.01 to 0.15.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.