Optical data reader

Details Optical data reader Optical data reader

1985-02-27

1987-04-28

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

G11B 7135

Patent

active

046619437

ABSTRACT:
An optical data reader having an improved servo system for maintaining an orthogonal relation between the optical axis of an irradiating light beam and the surface of a recording disc onto which the light beam is directed. The data reader includes a holding mechanism for the optical system, movable in the radial direction of the disc, and a tilt servomechanism. The tilt servomechanism includes flexible members for supporting an objective lens of the optical system of the reader so as to be rotatable and movable in a plane including the rotational axis of the disc, a detector for detecting deviation from the orthogonal, and a drive device for moving the objective lens in accordance with the detection signal.

REFERENCES:
patent: 4236232 (1980-11-01), Jansen et al.
patent: 4449213 (1984-05-01), Noborimoto et al.
patent: 4555780 (1985-11-01), Koide
patent: 4589103 (1986-05-01), Tajima

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