Optical head with improved extinction ratio for magneto-optical memory
US4672593A · kind A · utility
15Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1985 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Jul 1, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10532
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical head for a magneto-optical memory in which the major axis (the phase advance axis or phase lag axis) of optical anisotropy of a lens focusing a linearly polarized laser beam onto a magneto-optical recording medium is arranged to coincide with the direction of linear polarization of the laser beam incident upon the lens, thereby improving the extinction ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.