Optical recording medium and device for writing and reading information in and from the recording medium
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United States of America Patent
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Aug 25, 1992
Grant Date -
N/A
app pub date -
Aug 13, 1990
filing date -
Dec 20, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to an optical recording medium having a plurality of guide lines (1) and data regions (5) which are defined between adjacent guide lines and in which data is optically recorded. Each guide line (1) includes a start guide (2) indicating the leading end of the data region, clock guides (3) arranged at a predetermined interval to follow the start guide (2) and enabling synchronization during reading and writing, and sector marks (4) arranged at a predetermined interval so as to divide the data region (5) into a plurality of sectors. The clock guides (3) on adjacent guide lines are arranged in such a staggered manner that the clock guides (3) appear alternatingly in both guide lines. The data region having sector number writing portion (5a) provided in the vicinity of each sector mark (4) for writing a sector identification number to be written therein. This arrangement enables an easy recognition of a shift to the next data bit or to the next data bit writing position during reading and writing of the data. At the same time, the sector mark (4) improves the efficiency of the recording region.
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