Optical disk drive

Details Optical disk drive Optical disk drive

G - Physics

11

B

G11B 7/00 (2006.01) G11B 7/085 (2006.01)

Patent

CA 2057967

An optical disk drive discriminates whether a light spot incident on a disk is on a groove or on a land therebetween by eliminating a pulse that appears in a binary envelope signal when the light spot passes a level section on the disk. The elimination is carried out based on an ODF section detecting signal, the ODF section detecting signal is a level section detecting signal which is produced by detecting a level section (ODF section) on the optical disk. The detection is carried out by differentiating an envelope signal, which is the envelope of an electric signal corresponding to the amount of light reflected from the optical disk. Accordingly, even if the optical disk in use has interrupted grooves, the optical head can be accurately moved to a desired track located on a land or on a groove.

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