Optical recording/reproducing focusing apparatus

Details Optical recording/reproducing focusing apparatus Optical recording/reproducing focusing apparatus

1988-12-27

1991-05-21

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

G11B 700

Patent

active

050181211

ABSTRACT:
An apparatus for focusing a light beam onto an object includes a directing element for directing the light beam onto the object, a first detector for detecting the light beam from the object so as to generate a focus signal representing a distance of the directing element with respect to the object. The apparatus further includes a generator for generating a reproduced signal representing the data from the focal signal generated by the first detector. An adjuster adjusts the location of the directing element with respect to the object in accordance with the envelope of the reproduced signal generated by the generator.

REFERENCES:
patent: 4243848 (1981-01-01), Utsumi
patent: 4492856 (1985-01-01), Kimura
patent: 4701897 (1987-10-01), Nakagawa

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