Ablative optical recording medium
US4241355A · kind A · utility
40Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1977 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Sep 29, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D15/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ablative recording medium comprises a substrate coated with a light reflecting coating which in turn is coated with a light absorptive layer selected from the group consisting of lead phthalocyanine, chloroaluminum phthalocyanine, vanadyl phthalocyanine, stannic phthalocyanine and chloroaluminum chlorophthalocyanine. During recording, portions of the dye layer are ablated or vaporized by an intensity modulated focussed light beam, thereby exposing portions of the reflective layer and recording video information as a reflective-antireflective pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.