Cross-track tilt error compensation method for optical disc driv

Details Cross-track tilt error compensation method for optical disc driv Cross-track tilt error compensation method for optical disc driv

1996-02-21

1997-05-06

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4429, 369 4435, G11B 709

Patent

active

056278080

ABSTRACT:
A method for deriving a track offset signal to be applied to a tracking error signal particularly adapted for use with a disc drive having a servomechanism and actuator for positioning a read or write spot on a track of a disc in response to the tracking error signal is disclosed. The method includes determining a signal representation of the focus height as a function of disc radius, and differentiating the focus height signal to derive a cross-track tilt signal, applying the cross-track tilt signal to a transform which produces a track offset signal.

REFERENCES:
patent: 4730294 (1988-03-01), Funada
patent: 5048002 (1991-09-01), Horie et al.
patent: 5251194 (1993-10-01), Yoshimoto et al.
patent: 5351224 (1994-09-01), Nagata et al.

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