Acoustoelectric device for reading or processing a two-dimension

Details Acoustoelectric device for reading or processing a two-dimension Acoustoelectric device for reading or processing a two-dimension

1979-09-13

1981-07-28

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358201, 310313B, H04N 530

Patent

active

042813506

ABSTRACT:
The device comprises a piezoelectric medium associated with a semiconducting and photosensitive medium on which the optical image is projected. Four transducers placed on the piezoelectric medium emit four elastic waves in two distinct directions with wave numbers such that the signal resulting from the interaction of these waves has a zero wave number. Depending on the waveform of the signals applied to the transducers, it is possible to obtain either point-by-point reading of the image or the Fourier transform of said image.

REFERENCES:
patent: 4069507 (1978-01-01), DeFranould
patent: 4084192 (1978-04-01), DeFranould
patent: 4085348 (1978-04-01), Munier
patent: 4122495 (1978-10-01), DeFranould
patent: 4142212 (1979-02-01), Scott
patent: 4225887 (1980-09-01), Gautier

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