Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1985-07-01
1987-06-09
Psitos, Aristotelis M.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
369110, 369112, 360114, 365122, G11B 1100, G11B 700
Patent
active
046725938
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.
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patent: 4532619 (1985-07-01), Sugiyama et al.
patent: 4558440 (1985-12-01), Tomita
patent: 4561032 (1985-12-01), Matsumoto et al.
patent: 4569035 (1986-02-01), Tomita
patent: 4571650 (1986-02-01), Ojima et al.
patent: 4573149 (1986-02-01), Deguchi et al.
Kato Tsuyoshi
Ojima Masahiro
Saito Atsushi
Hitachi , Ltd.
Psitos Aristotelis M.
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