Optical relay whose target operates ferroelectrically

Abstract From the Canadian patent

The invention relates to an optical relay comprising a target of an electrically insulating material and transmitting light in dependence on the electric field parallel to the direction of propagation of the light, means for scanning a first face of the target by means of an electron beam, an anode which collects the secondary electrons emitted by the beam an optically, transparent and electrically conducting plate arranged at the second face of the target, the target receiving the electric video information signal, thereby forming a control electrode, the target being constituted of a material which becomes ferroelectric below a certain temperature, called the Curie temperature in the …