Magneto-optical record carrier with recording track structure suited for high density recording
US5553038A · kind A · utility
1Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10532
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-optical record carrier having a recording track structure which enables recording with an increased information density. Information areas which are smaller than the write spot supplied by a first diode laser can be written by means of a switched magnetic field. The areas can then be read with a read spot which is smaller than the write spot, which read spot is formed by radiation from, for example, the combination of a second diode laser and a frequency doubler. The width of the recording tracks determines the width of the information areas recorded thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.