Optical system in a magneto-optical memory device
US4721368A · kind A · utility
22Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1984 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Nov 6, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10532
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-optical memory device includes a recording medium having a magnetic anisotropy in a direction perpendicular to the main surface thereof. A semiconductor laser is employed in an optical system of the magneto-optical memory device for reproduction purposes. A polarization beam splitter is disposed in the optical system. A multi coated dielectric thin-film is deposited on the reflection surface of the polarization beam splitter in order to establish a desired relationship between the reflection of the P-polarization component and the S-polarization component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.