Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1980-03-17
1982-12-21
Faber, Alan
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 45, 369112, 369120, 369122, 350432, 250201, 250202, G11B 700
Patent
active
043653235
ABSTRACT:
An optical read unit is described for scanning a record carrier with a radiation-reflecting trackwise-arranged information structure. The read unit utilizes a diode laser which generates the read beam and also detects the information stored on the record carrier. The read unit is also provided with an opto-electronic system for detecting the position of the read spot relative to a track to be read and the position of the plane of focussing. The diode is mounted in a housing and the unit includes electromechanical apparatus for moving the housing in two perpendicular directions so as to correct the position of the read spot. The objective system for the formation of the read spot is of simple construction.
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University Physics, by Sears et al., .COPYRGT.1962, Addison--Wesley Publishing Co., Inc., p. 843.
Heemskerk Jacobus P. J.
Immink Kornelis A.
Simons Carel A. J.
Briody Thomas A.
Faber Alan
Mayer Robert T.
Tamoshunas Algy
U.S. Philips Corporation
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