Method of optically reading information, optical pickup apparatu

Details Method of optically reading information, optical pickup apparatu Method of optically reading information, optical pickup apparatu

1994-09-28

1996-01-16

Sniezek, Andrew L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369109, 369111, 369121, G11B 7085

Patent

active

054854415

ABSTRACT:
A method of optically reproducing information from an optical recording medium on which concave or convex signal pits are formed, is provided with the steps of: irradiating each of pit edge portions of one signal pit which are opposed to each other, with a reading light respectively; detecting a reflection light from each of pit edge portions, separately, to output two detection signals indicating detected positions of the pit edge portions with respect to one signal pit; and reproducing one information recorded in one signal pit on the basis of the two detection signals.

REFERENCES:
patent: 3971002 (1976-07-01), Bricat et al.
patent: 4581728 (1986-04-01), Nakamura et al.
patent: 5003528 (1991-03-01), Motes et al.
patent: 5093822 (1992-03-01), Kugiya et al.

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