Optical disc tracking system with switching of tracking error si

Details Optical disc tracking system with switching of tracking error si Optical disc tracking system with switching of tracking error si

1986-09-25

1988-11-22

Cardillo, Raymond F.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 44, 369 54, 369 58, G11B 7095, G11B 2110

Patent

active

047870761

ABSTRACT:
A tracking system for positioning a light spot onto a magneto-optic disc having a beam guide track preformatted thereon, includes a main light beam and two auxiliary light beams, and a circuit for switching between a low frequency component of a tracking error signal, detected by respective auxiliary light beam detectors, and a tracking error signal detected by a main light beam detector.

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