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:
Feb. 24, 1976
Filed:
May. 22, 1974
Applicant:
Inventors:
Francois Micheron, Paris, FR;
Philippe Bied-Charreton, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ; G03H / ;
U.S. Cl.
CPC ...
350-35 ; 3401 / ; 3401732 ; 350150 ; 3501 / ;
Abstract
A high operational reliability modulator, constituted by a mosaic of elements having variable double-refraction properties. It comprises, on a flat ferro-electric ceramic structure and in respect of each element, a first conventional pair of transparent electrodes and a second pair of distinct electrodes, made of transparent photoconductive material; by the application of illumination, the second electrodes are rendered conductive exclusively at the required instant, thus avoiding any interim disturbance to the action of the first electrodes and enabling the change of double-refraction properties of the ceramic.