Information reproducing apparatus for reproducing information by magnetic wall movement
US5956296A · kind A · utility
10Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1997 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Sep 16, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information reproducing apparatus for reproducing information by moving a magnetic wall along an information track on a recording medium. The apparatus includes an optical system for irradiating the recording medium with a light spot of an oval shape having a longer axis and a shorter axis, of which the longer axis is substantially parallel to the information track and a ratio of the longer axis to the shorter axis is at least 1.4, and a movement device for performing relative movement between the light spot and the recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.