Data disc optical reader containing a device for automatic data

Details Data disc optical reader containing a device for automatic data Data disc optical reader containing a device for automatic data

1977-04-19

1978-08-08

Cook, Daryl W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003N, 1791004D, 360 78, G11B 712, H04N 576, G11B 1914, G11B 2108

Patent

active

041060580

ABSTRACT:
The invention concerns the reading by optical means of data recorded along a track on a disc; an address code, which increases one unit at each step, is recorded on the disc at the same time as the data. The optical reader contains a device for the fast movement of the reading head in a direction radial to the disc, a device for counting the number of track grooves thus crossed, a device for automatic access to some given data which contains a device for detecting addresses recorded and a programmed control circuit which triggers fast movement or a step by step movement of the reading head depending on whether the reading head is far from the track groove whose address has been recorded or is near to this track groove.

REFERENCES:
patent: 3530447 (1970-09-01), Lambert
patent: 3937903 (1976-02-01), Osann, Jr.
patent: 3944727 (1976-03-01), Elliott

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