Integrated magneto-optical having a magnetic head set back from an optical head
US5440530A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Mar 8, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An integrated magneto-optical read and write head having a magnetic head set back from an optical head. The integrated magneto-optical head includes an optical subassembly having optical input for receiving optical radiation and an optical output positioned in an output plane. A magnetic subassembly includes a magnetic circuit having at least one polar part PPI placed in a plane perpendicular to the output plane, the polar part PPI exhibition a magnetic pole toward a recording medium. The magnetic pole is set back relative to the output plane of the optical output to reduce the difference between the magnetic coercive field below the optical output and the magnetic pole such that a larger range of magneto-optical materials may be employed in magneto-optical heads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.