Device for optical recording and read-out of data along a...

Details Device for optical recording and read-out of data along a... Device for optical recording and read-out of data along a...

G - Physics

11

B

352/32.1

G11B 7/00 (2006.01) G11B 7/0045 (2006.01) G11B 7/007 (2006.01) G11B 7/09 (2006.01) G11B 7/125 (2006.01) H04N 5/76 (2006.01)

Patent

CA 1189968

DEVICE FOR OPTICAL RECORDING AND READ-OUT OF DATA ALONG A PRERECORDED TRACK ABSTRACT OF THE DISCLOSURE The invention relates to optical devices enabling writing and reading of data on a disc comprising a preformed pattern, the recording and reading operations utilising a lighting spot able to illuminate only a single track element at a time. The invention provides a preformed pattern such that the spot overlaps on the track elements bordering a track interstice and vice versa, in such manner as to obtain a preformed contrast which can be accentuated by recording the data. The invention is applicable in particular to the recording of video frequency signals and to storing digital data on a disc.

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