G - Physics – 11 – C
Patent
G - Physics
11
C
G11C 11/42 (2006.01) G11B 7/00 (2006.01) G11C 13/04 (2006.01) G11C 13/06 (2006.01)
Patent
CA 2091107
Devices for optical storage of information consist of an optical storage medium and an optical device, generally known as a head to read information from or write information onto the medium. In order to read from or write information onto the various points on the surface of the medium there usually is relative motion between the head and the surface of the storage medium. This is usually accomplished by moving the head, the surface or both in such a manner as to bring the desired points of the surface to the immediate neighbourhood of the head so that the head may read information from or write information to these points. It is most common to have the storage medium in the form of a circular platter which spins while the head traverses the surface of the disc following a path which is approximately radial relative to the platter. In this invention, the need for relative motion between the optical storage medium and the head is eliminated by the use of a two dimensional array of optical elements which cover the surface of the corresponding two dimensional optical storage medium. Each element consists of optical reading and writing devices which are used to read information from or write information onto a location on the surface of the optical storage medium which is directly opposite to the optical element. The optical elements may be packed together as closely as is permitted by the currently available technology and the shape of this two dimensional array of optical elements and the two dimensional optical storage medium may be made to correspond to each other so as to maximise the amount of information stored on the surface of the optical storage medium. The array of optical elements can be controlled so as to concurrently write to or read from multiple locations on the storage medium or to write to or read from only one point at any given instant of time. Furthermore, by using two arrays of optical elements, one on each side of a two dimensional optical storage medium capable of storing information on both sides, information may be written to or read from both surfaces of the storage medium.
Na
Sayeed Kabeer Ahmed
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