System and method of optical information storage in a recording disc
US4330883A · kind A · utility
9Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1979 |
| Grant date | May 18, 1982 |
| Priority date | — |
| Expiry date | Sep 18, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/00455
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and a method of recording information by changes of refractive index and light absorption coefficient on a thin film, and reproducing the recorded information by scanning a focussed monochromatic light along a track on a thin film of a selected thickness and letting a light component reflected at a light-incident surface of said thin film and the other light component reflected at an inside face of the opposite surface to said incident surface of the thin film interfere with each other thereby efficiently to vary intensity of reflection light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.