Ablatable medium for optical recording
US4218689A · kind A · utility
18Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1978 |
| Grant date | Aug 19, 1980 |
| Priority date | — |
| Expiry date | Jan 30, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- 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 6,6'-diethoxythioindigo. 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.