Optical disk apparatus

Details Optical disk apparatus Optical disk apparatus

1994-10-17

1996-03-12

Ben, Loha

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 54, 369 4411, 369 4441, 369110, 369 4432, G11B 700

Patent

active

054992303

ABSTRACT:
Signals from two light receiving sections of a 2-split photodetector are separated to the AC coupled high frequency side and the DC coupled low frequency side. Both signals are added, thereby forming a tracking error signal of a wide band. A tracking error signal is independently formed with respect to the high frequency side and can be also added to the signal on the low frequency side.

REFERENCES:
patent: 4835759 (1989-05-01), Saito et al.
patent: 5103440 (1992-04-01), Yamamura
patent: 5109367 (1992-04-01), Yoshikawa
patent: 5181195 (1993-01-01), Kume et al.
patent: 5199012 (1993-03-01), Imai
patent: 5247501 (1993-09-01), Hashimoto et al.
patent: 5251196 (1993-10-01), Morimoto et al.
patent: 5404344 (1995-04-01), Imada et al.
patent: 5416764 (1995-05-01), Chikazawa et al.

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