Memory device
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United States of America Patent
Stats
-
Jul 30, 1985
Grant Date -
N/A
app pub date -
Jun 25, 1982
filing date -
Jun 25, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An information storage and retrieval system has a storage medium, a read device and a write device. The system uses light to transmit signals between the storage medium and the read, the write devices. And it is capable of both read and write operations. The storage medium has a substrate with a number of cells of empty spaces in it. The cell has an ablative material deposited on its wall. The pattern of distribution determines the information stored. To read an information, a light beam is directed towards a cell and the transmitted light is detected by a sensor. To write an information, the ablative material is vaporized and redistributed inside the cell by high intensity light beam. The storage medium can also be used to store visual images directly by having cells and pigment plates arranged regularly in a substrate.
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