Centering detection system for an apparatus for playing opticall

Details Centering detection system for an apparatus for playing opticall Centering detection system for an apparatus for playing opticall

1976-03-23

1977-11-08

Wolff, John H.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003V, 1791003G, H04N 576, G11B 712

Patent

active

040578330

ABSTRACT:
An apparatus as described for reading a record carrier on which information, for example video and/or audio information is stored in an optically readible track-shaped information structure. A deviation between the center of a read spot which is projected on the information structure and the center line of a track to be read can be detected with the aid of at least two detectors which are disposed in the far field of the information structure in different quadrants. With the aid of the same detectors a reference signal is obtained which is used for deriving a control signal for correcting the position of the read spot relative to the track to be read.

REFERENCES:
patent: 3876841 (1975-04-01), Kramer
patent: 3876842 (1975-04-01), Bouwhuis
patent: 3962720 (1976-06-01), Braat

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