Ablative optical recording medium
US4242689A · kind A · utility
14Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1977 |
| Grant date | Dec 30, 1980 |
| Priority date | — |
| Expiry date | Sep 19, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/254
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An ablative recording medium comprises a substrate coated with a light reflecting layer which in turn is coated with a light absorptive layer of di-indeno[1,2,3-cd:1',2',3'-lm]perylene. During recording, portions of the light absorptive layer are ablated by a modulated focussed light beam, thereby exposing portions of the reflecting layer. Video information is recorded as a reflective-antireflective pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.