The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 1978
Filed:
Apr. 12, 1977
Philippe Defranould, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
The device comprises a silicon substrate, means for generating a pulse elastic wave at the surface of the substrate on to which the image for read-out is projected, and elementary detectors detecting the conductivity of the substrate. Each of the detectors is constituted, in one embodiment, by two conductive bands arranged at a short interval from one another, perpendicularly to the direction of propagation of the elastic wave; a potential difference is applied between the conductive bands. The elementary detectors then sequentially furnish an electrical signal resulting at each point on the substrate from the superimposition on the one hand of the conductivity due to the image by photoelectric effect, and on the other of the conductivity due to the elastic wave by piezo-resistive effect.