Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1977-08-15
1980-03-11
Konick, Bernard
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
1791003V, H04N 576
Patent
active
041930908
ABSTRACT:
The present invention relates in general to an optical video detection system for retrieving recorded information. More particularly, the invention relates to an optical detection system whereby optical means focus a laser beam into a reading spot of an area sufficient to interrogate, simultaneously, a plurality of the light scattering elements in at least two adjacent segments of the spiral track. The reading spot further has a dimension in the longitudinal direction of the track such that the spot is incapable of resolving the recorded carrier. Since the information content of adjacent tracks is substantially the same, averaging of the nonscattered light by a photodetector will provide a useful replica of the baseband signal, that is the video signal, modulated upon the carrier.
REFERENCES:
patent: 3701846 (1972-10-01), Zenzefilis
patent: 3795902 (1974-03-01), Russell
patent: 3833769 (1974-09-01), Compaan et al.
patent: 3838401 (1974-09-01), Graf et al.
patent: 3911483 (1975-10-01), Kihara et al.
patent: 3919465 (1975-11-01), Adler et al.
patent: 3919562 (1975-11-01), Whitman
patent: 4015285 (1977-03-01), Romeas
Konick Bernard
McElheny Jr. Donald E.
O'Connor Cornelius J.
Zenith Radio Corporation
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