| 摘要 |
When a sub-track having burst data A and D, a sub-track having burst data A and C, a sub-track having burst data B and C, and sub-track having burst data B and D are repeatedly arranged in this order, in accordance with equations 1 and 2, a sub-track t included in a track T determines the value of a constant n within a range of 1.2 (inclusive) to 1.8 (inclusive) so as to obtain linearity between a position in a disc radial direction r and a head position P in a disc radial direction r in the sub-track t. Subsequently, the head position P is calculated using the determined constant n and equations 1 and 2: <?in-line-formulae description="In-line Formulae" end="lead"?>P=(A-B)*|A-B|<img id="custom-character-00001" he="2.79mm" wi="1.44mm" file="US20060221491A1-20061005-P00001.TIF" alt="custom character" img-content="character" img-format="tif"/>(n-1)/(|A-B|<?img id="custom-character-00002" he="2.79mm" wi="1.44mm" file="US20060221491A1-20061005-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?>n+|C-D|ˆn) (1) <?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>P=(C-D)*|C-D|<img id="custom-character-00003" he="2.79mm" wi="1.44mm" file="US20060221491A1-20061005-P00001.TIF" alt="custom character" img-content="character" img-format="tif"/>(n-1)/(|A-B|<?img id="custom-character-00004" he="2.79mm" wi="1.44mm" file="US20060221491A1-20061005-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?>n+|C-D|<?img id="custom-character-00005" he="2.79mm" wi="1.44mm" file="US20060221491A1-20061005-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?>n) (2) <?in-line-formulae description="In-line Formulae" end="tail"?>
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