Apparatus for reading an optical radiation-reflecting record car

Details Apparatus for reading an optical radiation-reflecting record car Apparatus for reading an optical radiation-reflecting record car

1977-06-30

1979-01-16

Cardillo, Jr., Raymond F.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003V, H04M 576, G11B 712

Patent

active

041352076

ABSTRACT:
An apparatus is described for reading an optically encoded radiation-reflecting information carrier, using an opto-electronic focussing error detection system. The path of the read beam which is directed towards the information carrier includes a radiation-deflecting element producing a narrow focussing beam that co-operates with two focussing detectors to produce an error signal.

REFERENCES:
patent: 3876842 (1975-04-01), Bouwhuis
patent: 3913076 (1975-10-01), Lehureau et al.
patent: 3924063 (1975-12-01), Simons
patent: 3971002 (1976-07-01), Bricot et al.
patent: 3974327 (1976-08-01), Van Disk
patent: 4005259 (1977-01-01), Kaneko

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