Magneto-optical storage process
US4497007A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1982 |
| Grant date | Jan 29, 1985 |
| Priority date | — |
| Expiry date | Mar 12, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G19/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to a magneto-optical storage and playback process for travelling information carriers, by recording on a magnetizable information carrier (1) in the form of a tape, disc or roller while the carrier is in motion, said information carrier having information areas which are larger than 0.2 .mu.m and smaller than 20 .mu.m in one direction of the information plane, the process being carried out by the production of a geometrical structure (4) by the action of the magnetic fields of the recorded information on particles whose greatest length is less than 0.1 .mu.m, preferably 0.02 .mu.m, and by optical scanning of these structures in which light of wavelength 0.38 to 0.8 .mu.m is diffracted on the surface of the moving information carrier (1) and diffraction images are produced which serve for the interpretation of the information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.