Optical information recording/reproducing apparatus comprising d

Details Optical information recording/reproducing apparatus comprising d Optical information recording/reproducing apparatus comprising d

1995-05-22

1996-01-16

Epps, Georgia Y.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4411, 369 4428, 369 4426, G11B 700

Patent

active

054854407

ABSTRACT:
An optical information recording/reproducing apparatus for recording and/or reproducing information on and/or from an optical memory medium includes an optical system for forming a light beam spot for recording and/or reproducing information on and/or from the optical memos medium, a signal generating unit for detecting a position of the optical system relative to the medium and generating an analog signal corresponding to the detected position, an actuator for driving the optical system, an A/D converter for converting the analog signal from the signal generating unit into a digital signal, a digital signal processing unit for calculating a control amount of the actuator on the basis of a predetermined control process in order to correct the relative position from an output from the A/D converter, and a D/A converter for converting the output from the digital signal processing unit into an analog signal. The actuator is driven in correspondence with the output from the D/A converter. The control process of the digital signal processing unit can be arbitrarily changed.

REFERENCES:
patent: 4907214 (1990-03-01), Nagano et al.
patent: 4918676 (1990-04-01), Miyasaka
patent: 4918680 (1990-04-01), Miyasaka
patent: 5105075 (1992-04-01), Ohta et al.
Katsuhara, et al., "Fine Seek Technique," Japanese Journal of Applied Physics/Supplements, vol. 26, No. 26-4, 1987, Tokyo, Japan, pp. 191-194.

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