Tracking control apparatus for an optical disk device

Details Tracking control apparatus for an optical disk device Tracking control apparatus for an optical disk device

1992-10-22

1994-07-19

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4427, 369 4425, 369 54, G11B 700

Patent

active

053316150

ABSTRACT:
The temperature around the tracking actuator is detected with a temperature sensor, and the characteristics of an equivalent digital filter are changed to match the characteristics of the tracking actuator at the detected temperature. When the temperature is low, a current is applied to the focus control coil to raise the temperature of the tracking actuator, thereby essentially matching the transfer functions of the tracking actuator and the equivalent filter.

REFERENCES:
patent: 4149201 (1979-04-01), Card
patent: 4611316 (1986-09-01), Takeuchi et al.
patent: 4769806 (1988-09-01), Takamori
patent: 5177726 (1993-01-01), Terada
patent: 5204593 (1993-04-01), Ueki

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