Optical recording medium, reproducing method, and reproducing apparatus
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United States of America Patent
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May 18, 2004
Grant Date -
N/A
app pub date -
Jun 29, 2000
filing date -
Jun 30, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention provides an optical recording medium having a structure in which a plurality of recording layers are stacked, and a reproducing method and apparatus for the medium. As an interlayer interposed between first and second recording layers, this invention uses a layer which guides converged light irradiating the first recording layer to the second recording layer such that the beam diameter on the second recording layer is substantially equal to the beam diameter on the first recording layer.
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