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:
Sep. 06, 1983
Filed:
Dec. 02, 1981
Applicant:
Inventors:
Jean-Pierre Huignard, Paris, FR;
Pierre Leclerc, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
455601 ; 455606 ; 455612 ; 455617 ; 250578 ; 250551 ; 370-1 ; 35016211 ; 350169 ;
Abstract
A Switch is disclosed which makes it possible to optically connect at least one of the circuits of a group of input circuits to at least one circuit of a group of output circuits. A photosensitive medium is illuminated by parallel beams from a matrix of input circuits which beams are then defracted on layers written in the medium and then reach one of the circuits of the matrix of photoreceiver circuits. The layers are written by interference of two beams whose wavelengths differ from that of input beams with the wavelength of the input beams being out of the spectral sensitivity range of the photosensitive medium.