Method and apparatus of compensating for misalignment in an optical disk device
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United States of America Patent
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Sep 13, 2011
Grant Date -
Sep 6, 2007
app pub date -
Feb 2, 2007
filing date -
Mar 8, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus of compensating for misalignment in an optical disk device includes detecting a plurality of focus error signals, comparing the focus error signals, and shifting a position of an optical lens based on the comparison. Alternatively, a one or more of the focus error signals may be compared to a reference signal and a corresponding shift may be performed. When the lens is shifted, an optical spot corresponding to an optical beam reflected from a disk surface is corrected to a position which reduces or eliminates misalignment errors attributable to one or more elements of the pickup.
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