Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1988-09-09
1991-03-26
McElheny, Jr., Donald
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
365109, G11B 700
Patent
active
050035282
ABSTRACT:
The invention comprises a data storage device in which ferroelectric photorefractive cells 12 susceptible to polarization for the storage of digital information are positioned on a carrier medium, preferably a disk 10, which supports the cells and allows access to them by optical beams 14, 16 and electric fields 21. A non-contacting data writing means comprising dual electrodes 20, 22 is used to change the polarity of the cells. A non-contacting data reading means comprising lasers 14, 16 and detectors 30, 34 is used to observe photorefractive effects so that the polarity of such cells 12 can be determined. The polarity of the ferroelectric photorefractive cells is coded for the storage of digital information.
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Gallegos Ronald W.
Motes Raymond A.
McElheny Jr. Donald
Morris Jules J.
Singer Donald J.
The United States of America as represented by the Secretary of
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