Piezoelectric device for image readout

Details Piezoelectric device for image readout Piezoelectric device for image readout

1975-03-21

1977-05-24

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

310 8, 310 97, 250211R, H04N 314

Patent

active

040259544

ABSTRACT:
A device which converts the spatial distribution of the received light energy into a modulation of an electric signal. It comprises: a non-piezoelectric substrate; an electro-mechanical transducer in the form of interleaved comb shaped electrodes deposited on the substrate and covered by a piezoelectric layer, and a photoconductive layer covering the piezoelectric layer. The image is projected on to the photoconductive layer and, when the transducer is short-circuited, an elastic wave modulated by the image is propagated in the substrate towards an output transducer which delivers the electric reading signal.

REFERENCES:
patent: 3505572 (1970-04-01), Yamashita et al.
patent: 3787786 (1974-01-01), Defebvre et al.
patent: 3826865 (1974-07-01), Quate et al.
patent: 3826866 (1974-07-01), Quate et al.
patent: 3893047 (1975-07-01), Lardat
"Planar Beam Steering Bulk Acoustic Wave Transducer", by L. Kuhn, IBM Technical Disclosure Bull., vol. 15, No. 10, 3/73, pp. 3275-3276.

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