Optical disc apparatus and method of setting defocus value thereof
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United States of America Patent
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Feb 16, 2010
Grant Date -
Feb 14, 2008
app pub date -
Nov 15, 2006
filing date -
Jun 6, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical disc apparatus is disclosed that comprises a jitter value detecting circuit that detects a jitter value based on the signal read out from an optical disc; and a defocus value setting circuit that adjusts a defocus value used for moving an objective lens along the direction of a light axis when focusing of the objective lens to the optical disc is performed, based on the signal that has gone through the jitter value detecting circuit, and causes a defocus adjustment to be made based on the defocus value.
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