Accurate Track-Count Accessing of Optical Disk Drive

概要

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In order to create a rapid accessing feature of optical disk drives, the optical head should be positioned as accurately as possible near the target track if seeking motion is desired. First, an accurate seeking span decision algorithm employed to predict the spiral tracks' rotational number during seeking is discussed. Second, a method of correcting a miscount in the number of crossing tracks for accurate track-count accessing is proposed. During the seeking operation, the method of correcting the track miscount can generate a virtual track-crossing pulse in real time when a track-crossing pulse is missed due to a distorted tracking error signal during seeking. These two methods are practically installed in a 130 mm Infernational Organization for Standardization (ISO) format optical disk drive and effectively operated for accurate trackcount accessing.
社団法人応用物理学会の論文
1992-02-28