System and method of reproducing signals recorded on a magneto-optic recording medium
US5241520A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1991 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Dec 21, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10586
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-optical recording medium has a multi-layer magnetic film structure comprising a reproducing layer, an intermediate layer, and a record holding layer. These layers are magnetically coupled to one another. The recording medium is irradiated with a laser beam and appropriate magnetic fields are provided such that in a area of a spot of the laser beam on the recording medium, first, second and third regions are formed as a result of the temperature distribution within the laser beam spot. The first and third regions act as masking regions, with the second region between the first and third regions being a region from which magnetic signals stored in the record hold layer are transferred to the reproducing layer and are read out from the reproducing layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.