Optical disk drive and tracking error detection method for an optical disk drive
A technology of optical disc drive and tracking error, which is applied in the direction of recording/reproducing with optical methods, instruments, optical record carriers, etc., and can solve the problems of inapplicability, unreliable signal, disappearance, etc.
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[0033] figure 1 The portion of the new disk shown represents the disk in read-only format. A track portion 12 therein is constituted by trajectories formed by pits 14 and lands 16 . likewise in figure 2 , a perspective view of a portion 20 of a (re)writable disc is shown, where the track portion is formed by a wobbled pre-groove 22 . Such pre-grooves for tracking purposes in non-written optical discs are known, for example, from the CD-R / RW, DVD±R / RW or BD-R / RF standards, among others.
[0034] On both formats, tangential tracks of pits and lands in the read-only format and pre-grooves in the (re)writable format, the track portions 12, 22 are not equally spaced. Select two different track pitches TP 1 and TP 2 , so that every second track portion is set to the left from its adjacent track portion by the first distance TP 1 and a second distance TP at the right margin to its adjacent track portion 2 . In this way, beams 18 and 28 are formed, respectively, consisting of...
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