Electro-acoustic devices for analysing optical image

Facsimile and static presentation processing – Facsimile – Recording apparatus

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250211J, 357 30, H04N 314, H01L 2714

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active

040841928

ABSTRACT:
A reading device for analysing an optical image in one dimension and for converting it into an electrical signal the amplitude of which characterizes the light intensity of the elemental zones analysed by a semiconductive substrate and scanned by the interaction of acoustic surface waves on a piezoelectric substrate, which comprises, for increasing its sensitivity, discrete junctions on the surface of the photosensitive semiconductive substrate "scanned" by the surface waves arising out of the non-linear interaction, and wherein the output signal is collected between an electrode disposed on the other surface of the semiconductive substrate and an electrode of the piezoelectric substrate.

REFERENCES:
patent: 3826865 (1974-07-01), Quate et al.
patent: 3826866 (1974-07-01), Quate et al.
patent: 4041536 (1970-08-01), Melcher et al.
Quate et al., "Scanning Optical Patterns with Acoustic Surface Waves," Journal de Physique, Colloque C6, Tome 33, Nov.-Dec. 1972, pp. 231-234.

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