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:
Jul. 28, 1981
Filed:
Sep. 13, 1979
Applicant:
Inventors:
Charles Maerfeld, Paris, FR;
Herve Gautier, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358213 ; 358201 ; 3103 / ;
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.