Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1985-12-19
1986-06-10
Psitos, Aristotelis M.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360114, G11B 1100
Patent
active
045946990
ABSTRACT:
A Faraday-effect magneto-optic transducer of a rotary form includes first and second optical fibers having adjacent ends aligned with each other for joint rotation along a circular path. Opposing surfaces of a planar element of a magneto-optic material are attached respectively to the adjacent ends of the fibers for rotation therewith. The first fiber is arranged with respect to a light source for scanning an entering beam of polarized light along the circular path, a portion of which is immediately adjacent and substantially parallel to the information-bearing surface of a magnetic storage device, such as magnetic tape. The planar element modulates the entering light according to the magnetization of the region of the storage device adjacent the magneto-optic material. The second optical fiber receives light transmitted through the magneto-optic material, to form a beam of polarized light exiting the transducer, whereby the exiting light is modulated with respect to the entering light because of the Faraday magneto-optic effect.
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Datatape Incorporated
Monteith Dennis P.
Psitos Aristotelis M.
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