Recording and reproducing apparatus, method of calculating temperature characteristic compensation operation coefficient, and reproducing apparatus

A recording and reproducing apparatus is provided, which includes a rotary drive unit, an optical pickup unit, an adjustment unit which compensates for changes in characteristics of the laser light caused by changes in temperature, a temperature detection unit which detects a temperature of the opti...

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Bibliographic Details
Main Author NABETA MASAOMI
Format Patent
LanguageEnglish
Published 27.09.2011
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:A recording and reproducing apparatus is provided, which includes a rotary drive unit, an optical pickup unit, an adjustment unit which compensates for changes in characteristics of the laser light caused by changes in temperature, a temperature detection unit which detects a temperature of the optical pickup unit, an evaluation value generation unit which generates an evaluation value based on reflected light information, and a control unit. The control unit performs a temperature acquisition process, an optimum point adjustment process, a temperature acquisition process for acquiring a detected temperature during spin down, an optimum point search process, and a temperature characteristic compensation operation coefficient calculation process for performing temperature compensation with respect to the adjustment values.
Bibliography:Application Number: US20100802313