Dynamic information storage or retrieval – Storage medium structure – Combined with diverse art structure
Patent
1994-12-30
1997-01-07
Nelms, David C.
Dynamic information storage or retrieval
Storage medium structure
Combined with diverse art structure
3692753, 369 30, G11B 2500
Patent
active
055924620
ABSTRACT:
A three dimensional optical data storage and retrieval system includes a three dimensional optical data storage medium and an apparatus for providing access to data stored on the medium. According to one aspect of the invention, the data storage medium includes a number of concentric shells each of which has a curvilinear data storage surface for storing data in a number of substantially parallel data tracks. According to another aspect of the invention, the data storage medium includes a number of data storage surfaces which are rotatable about a common axis, each data storage surface for storing data in a number of substantially circular data tracks and having an optically transparent window which transects each of the data tracks. Each shell or data storage surface preferably has a drive engagement portion for engaging a driver to rotate the shells or data storage surfaces individually about a common axis. Several embodiments of spherical and cylindrical shell media are provided and a stacked discs embodiment is disclosed. Apparatus for accessing data on the medium includes a number of drivers for selectively rotating the shells and a laser-optical device. In some embodiments, a portion of the laser-optical device is incorporated in and made part of the outer shell of the medium. A jukebox apparatus is shown as well.
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Beldock Donald T.
Beldock James G.
Gordon David P.
Nelms David C.
Tran Andrew Q.
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