Optical data storage
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United States of America Patent
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Dec 4, 1984
Issued Date -
N/A
app pub date -
Jul 19, 1982
filing date -
Jul 23, 1981
priority date (Note) -
Expired
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Abstract
A thermoplastics data storage member carries information which can be imaged using non-coherent light and, in addition to and distinct from that information, control data which defines a two-coordinate system for the member which controls random access to the information. A reading apparatus comprises a non-laser optical system for imaging selected areas of the information and a servo-system, including a microprocessor and transducers for reading the control data, for positioning a reading head of the optical system in desired locations relative to the storage member. The invention affords cheap optical data bases readable by apparatus not requiring a laser optical system.
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