Optical information recording medium providing reflected light at two different wavelengths
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United States of America Patent
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-
May 22, 1990
Grant Date -
N/A
app pub date -
Mar 23, 1989
filing date -
Aug 12, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Recording medium having islands of light-emitting material in regions formed between a transparent substrate, and a reflective layer disposed on one principal surface thereof. The islands of light-emitting material are sensitive to illuminating light incident thereupon, and in response thereto, emit light having a different wavelength than said illuminating light. Reproducing apparatus separates an overall reflected light from the recording medium into first reflected light corresponding to a reflected scanning light, and second reflected light corresponding to emitted light from the light emitting material.
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