Record carrier on which information is stored in an...

Details Record carrier on which information is stored in an... Record carrier on which information is stored in an...

G - Physics

11

B

352/32.2, 352/32

G11B 7/24 (2006.01) G11B 7/007 (2006.01) G11B 7/09 (2006.01) H04N 5/76 (2006.01)

Patent

CA 1047642

ABSTRACT: A record carrier is described on which information is stored in an optically readable structure of trackwise arranged areas and intermediate areas. By giving at least one of the surfaces of the record carrier body excursions which are periodically variable in the track direction, it is possible in a simple manner to obtain an indication of the focussing of the read beam on the information structure during reading of the record carrier. -24-

219520

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