Deviation correction apparatus for optical disc light beams

Details Deviation correction apparatus for optical disc light beams Deviation correction apparatus for optical disc light beams

1984-03-15

1986-01-21

McElheny, Jr., Donald

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

350255, G11B 708

Patent

active

045660891

ABSTRACT:
A laser beam 11 focused to a spot 12 by an objective lens 30 for following an information track 24 on a video disc is subject to three mutually orthogonal deviations; lateral or tracking, focus, and time axis or jitter. To correct these the lens is mounted in a second holder 9, in turn flexibly mounted by spring strips 13a, 13b to a first holder 1, in turn rotatably and slidably mounted to a base 4 by a shaft and bearing 3, 2. Various permanent magnets 7, 10 and coils 5, 6, 8 cooperable therewith are disposed such that selected coil energizations move the lens relative to the information track to correct any detected deviations.

REFERENCES:
patent: 4135206 (1979-01-01), Kleuters et al.
patent: 4193091 (1980-03-01), Kleuters et al.
patent: 4467463 (1984-08-01), Yano
patent: 4473274 (1984-09-01), Yano et al.
patent: 4482988 (1984-11-01), Tsurushima et al.
patent: 4504935 (1985-03-01), Jansen

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