Optical recording medium having large guide groove track pitch/meander amplitude ratio
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United States of America Patent
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-
Oct 31, 1995
Grant Date -
N/A
app pub date -
Sep 15, 1993
filing date -
Sep 21, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A writable optical disk with meandering guide grooves is so arranged that a ratio of 'track pitch/meander amplitude' is not less than a certain value, for example 57, at least in an out-of-phase portion in which meander of the meandering guide grooves is out of phase on mutually adjacent tracks. Also, the track pitch in the out-of-phase portion is larger than that in an in-phase portion in which meander of the guide grooves is in phase on mutually adjacent tracks.
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