OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE AND OPTICAL INFORMATION RECORDING AND REPRODUCING METHOD
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United States of America Patent
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Issued Date -
Mar 17, 2016
app pub date -
Aug 11, 2015
filing date -
Sep 12, 2014
priority date (Note) -
Abandoned
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Abstract
An optical information recording and reproducing device performs high-speed reproduction without having to sequentially change the wavelength of a reproduction light source. The device includes: a laser light source which generates a signal light and a reference light; a temperature measurement unit which measures temperature at least at two or more positions; a wavelength adjustment unit which adjusts a wavelength of the laser light source according to a result of measurement by the temperature measurement unit; a temperature distribution calculation unit which calculates a temperature distribution on the basis of the result of measurement by the temperature measurement unit; and a control unit which controls a recording operation and a reproducing operation. The control unit controls permission and prohibition of the recording operation or the reproducing operation according to the temperature distribution calculated by the temperature distribution calculation unit.
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