Acousto-optical scanner

Details Acousto-optical scanner Acousto-optical scanner

1976-12-20

1978-04-11

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

333 72, 350 9613, H04N 312, H03H 900

Patent

active

040841910

ABSTRACT:
A scanning apparatus for converting an optical line image to a serial electrical analog signal by launching an acoustic wave in a plurality of ridged waveguides each of a different length. In one embodiment the launching transducer includes an electro-optical layer which modulates the acoustic wave as a function of the incident light intensity. In a second embodiment the acoustic wave is launched in each waveguide with the same amplitude but interacts with an acousto-optical overlay on the waveguide to amplitude modulate the intensity of the propagating acoustic wave. The thus generated and modulated acoustic waves are converted to electrical signals either by reflection back to the launching transducer or by individual transducers on each channel. The differing lengths converts the parallel image to a series electrical signal.

REFERENCES:
patent: 3826866 (1974-07-01), Quate et al.
patent: 3970778 (1976-07-01), Adkins
patent: 4012586 (1977-03-01), Roos
patent: 4025954 (1977-05-01), Bert

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