Data disc optical reader containing a device for automatic...

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

G - Physics

11

B

352/32.2

G11B 7/00 (2006.01) G11B 7/085 (2006.01) G11B 21/02 (2006.01) G11B 27/10 (2006.01) G11B 27/30 (2006.01)

Patent

CA 1093691

ABSTRACT OF THE DISCLOSURE: 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 direc- tion 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 addres- ses 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.

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