Method for acquiring the track data from a multiple track image

Details Method for acquiring the track data from a multiple track image Method for acquiring the track data from a multiple track image

1993-04-06

1995-06-20

Epps, Georgia Y.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369103, 369112, 369102, G11B 1118

Patent

active

054266238

ABSTRACT:
A method of reading data from an optical disk comprises providing means for illuminating the required part of the disk and acquiring the optical image of a plurality of tracks, providing a detector matrix comprising a plurality of detectors, each of the detectors being capable of producing an output signal which is proportional to the intensity of the light detected by it causing an optical image corresponding to an illuminated area to fall on the said detector matrix, transferring the output signal of the detector matrix to image processing means, determining position coordinates of the track center for each data track, by analyzing the output signal of the said detector matrix, saving in memory means expected track center data, comprising position coordinates of the track center located by the analysis of the output signal, and if an actually detected track center is shifted with respect to the expected track center, electronically moving the track center position.

REFERENCES:
patent: 4486870 (1984-12-01), Pettigrew et al.
patent: 4536866 (1985-08-01), Jerome et al.
patent: 5111445 (1992-05-01), Psaltis et al.
Patent Abstracts of Japan, vol. 12, No. 138 (P-695) 27 Apr. 1988 & JP-A-62 259 239 (Hitachi) 11 Nov. 1987--abstract.
Patent Abstracts of Japan, vol. 9, No. 24, (P-331 31 Jan. 1985 & JP-A-59 168 942 (Matsushita Denki Sangyo K K) 22 Sep. 1984--abstract.
Patent Abstracts of Japan, vol. 9, No. 86 (P-349) 16 Apr. 1985 & JP-A-59 215 033 (Hitachi Seisakusho K K) 4 Dec. 1984--abstract.

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