Optical pick-up system with servo using reflection plate having

Details Optical pick-up system with servo using reflection plate having Optical pick-up system with servo using reflection plate having

1993-06-03

1996-04-02

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4432, 369 4442, G11B 709

Patent

active

055047246

ABSTRACT:
Optical pick-up system and method for accurately reading information recorded on an optical disc. The invention makes it possible to determine the kind of an error occurring upon reading information recorded on an optical disc by light beams from a light source, by using error detectors, and to correct accurately the error by driving a focusing lens, thereby capable of rapidly correcting errors such as tracking/focusing errors, providing a light and compact construction and improving a reliance, so as to solve problems of a high sensitivity to variations, a poor assembling ability, a bulky construction and a degraded reliance, encountered in optical devices which have been generally used for reading information recorded on optical discs.

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patent: 5111448 (1992-05-01), Komma et al.
patent: 5200946 (1993-04-01), Fritz

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