Optical disk tracking control method, optical disk device, and o

Details Optical disk tracking control method, optical disk device, and o Optical disk tracking control method, optical disk device, and o

1994-10-12

1997-12-30

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4434, 3692754, G11B 700

Patent

active

057038465

ABSTRACT:
For use with an optical disk having a plurality of reference marks Mk arranged at intervals of P in the radial direction and deviant marks Hx (x=1, 2, . . . ) arranged so as to deviate in at least two different phases in the radial direction from the reference marks Mk, an optical disk tracking control method comprising the steps of: generating tracking error signals A, B, . . . with at least two different phases obtained by addition and subtraction on combinations of the light quantity signal corresponding to the reference mark Mk and the light quantity signals corresponding to the deviant marks Hx; and positioning the data tracks at intervals of P/4 or less in the radial direction based on the tracking error signals A, B, . . . .

REFERENCES:
patent: 4779253 (1988-10-01), Getreuer et al.
patent: 5093822 (1992-03-01), Kugiya et al.
patent: 5191571 (1993-03-01), Fukumoto et al.
patent: 5404345 (1995-04-01), Taki
patent: 5410531 (1995-04-01), Tsujioka
"Optical Components, Replicated Optics" product specification by Philips: Sep. 1994.
German Search Report dated Feb. 6, 1997 citing above listed references.

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