Optical information recording and reproducing apparatus

Details Optical information recording and reproducing apparatus Optical information recording and reproducing apparatus

1987-09-11

1989-04-04

Sikes, William L.

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 50, G11B 700, G11B 1552

Patent

active

048192201

ABSTRACT:
A means receiving a light returning from an optical recording medium and detecting the beam distribution in the tangential direction of the track of the recording medium is provided. The offset of at least one controlling signal of a focusing controlling signal and tracking controlling signal is eliminated by the output signal of this beam distribution detecting means.

REFERENCES:
patent: 4243850 (1981-01-01), Edwards
patent: 4417330 (1983-11-01), Hazel et al.
patent: 4544872 (1985-10-01), Hirano et al.
patent: 4561081 (1985-12-01), Janssen et al.
patent: 4562565 (1985-12-01), Tamura
patent: 4611317 (1986-09-01), Takeuchi et al.
patent: 4628497 (1986-12-01), Bierhoff

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