Overwritable magneto-optic recording and reproducing apparatus
US5043960A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1988 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | Sep 23, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10571
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to the present invention, the apparatus is provided with a single laser light source and arranged so that light from the laser light source is divided into a plurality of beams by a grating and the plurality of beams are converged to form a plurality of light spots on a recording film by an optical system, whereby in writing information onto a recording film, overwriting to perform erasing and writing at the same time is carried out and an error check on the recorded information is performed in real time while a magnetic field which is polarity-inverted or intensity-modulated in accordance with the recording information is applied to the recording film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.