Magneto-optical recording and reproducing apparatus and method
US6205092A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1997 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Nov 21, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10554
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-optic recording medium reproduction device includes a multi-clad, step index optical fiber, a semiconductor laser arranged on one end surface side of the optical fiber for providing laser beam to one end surface of the optical fiber, a photodetector arranged on one end surface side of the optical fiber and receiving laser beam from one end surface of the optical fiber, and a magnetic head for applying an alternating field to the magneto-optic recording medium. Since the other end surface of the optical fiber is arranged adjacent to the magneto-optic recording medium, an accurate signal can be reproduced even from an extremely small recorded domain. Furthermore, since an alternating field is applied to the magneto-optic recording medium, a domain transferred from a recording layer of the magneto-optic recording medium to a reproducing layer is expanded and a large reproduced signal can be obtained from the expanded domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.