Lens Shift Correction in Tracking Servo System for Digital Versatile Rewritable Disc

概要

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In this paper the development of tracking offset conrrection for playback of a digital versatile rewriable disc(so called DVD-RAM), is described. The slim drive, having a small optical pick-up head with a small objective lens, is easily influenced by the deviation of the push-pull tracking error signal due to lens shift. The DVD-RAM disk format provides information not only on the amount of lens shift using the push-pull tracking error signal of address marks to correct tracking deviation, but also an opportunity to determine the optimum initial lens position using the differential phase tracking error signal.
社団法人応用物理学会の論文
2000-02-28