Optical recording medium
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United States of America Patent
Stats
-
Mar 28, 1989
Grant Date -
N/A
app pub date -
Jan 27, 1987
filing date -
Jan 27, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical recording medium which is capable of easily effecting a tracking operation in the writing/reading for an optical recording medium of a type in which a plurality of data record tracks and provided, in a recording region of the medium, so as to be disposed side by side and spaced from each other at predetermined intervals. The optical recording medium of the present invention comprising at least one home position setting mark for setting a reference position for each of the data record tracks so that the writing/reading of data may be carried out by using the home position setting mark as a reference. The home position setting mark may have track position marks at positions corresponding to the respective data record tracks for indicating the positions of the respective data record tracks. At least two tracking position indicative marks may further be spacedly provided on an extension of each of the data record tracks or a line parallel therewith for indicating an effective tracking position for each of the data record tracks.
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