Optical read-out magnetic head
US4707755A · kind A · utility
8Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1986 |
| Grant date | Nov 17, 1987 |
| Priority date | — |
| Expiry date | Feb 26, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10547
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical read-out magnetic head of a single pole type having a main pole, an auxiliary pole, and a writing coil. The main pole consists of a high permeability film and a magneto-optical film, the magneto-optical film has an easy magnetization axis parallel to or in the extension direction of that film surface high permeability film. Writing is carried out magnetically by employing the coil, and reproduction is effected optically by employing the magneto-optic film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.