Optical disc apparatus with reduced leakage of wobble signal to

Details Optical disc apparatus with reduced leakage of wobble signal to Optical disc apparatus with reduced leakage of wobble signal to

1999-03-26

2000-08-08

Dinh, Tan

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4413, 369 58, 3692754, 369277, G11B 2700

Patent

active

061011630

ABSTRACT:
The invention relates to an optical disc apparatus more particularly relates to an optical disc apparatus which is suitably applied to an magneto-optic disc apparatus to reduce leakage of wobble signal to reproduction signal. To achieve the object, the signal level of the first and second beam quantity detection signals SI and SJ which generate the reproduction signal RF by use of the differential output is corrected based on the signal level SL of the wobble signal component detected from the reproduction signal RF and the phase detection result S.o slashed., or the wobble signal component is extracted respectively from the first and second beam quantity detection signals and subtraction is performed.

REFERENCES:
patent: 5844883 (1998-12-01), Kanno et al.
patent: 5848050 (1998-12-01), Nagasawa et al.
patent: 5852599 (1998-12-01), Fuji
patent: 5936921 (1999-08-01), Iimura
patent: 5936933 (1999-08-01), Miyamoto et al.
patent: 5940364 (1999-08-01), Ogata et al.

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