Storage tube target having mosaic of coplanar photoconductive elements and dielectric elements

Claim 1

IN A TUBE ARRANGEMENT FOR STORING AN OPTICALLY VIEWED IMAGE, AN EVACUATED ENVELOPE, AN ELECTRON GUN AT ONE END OF THE ENVELOPE, A TRANSPARENT VIEWING SEGMENT AT THE OTHER END OF THE ENVELOPE, SAID SEGMENT HAVING A TARGET ON THE INNER SURFACE THEREOF, SAID TARGET COMPRISING A COLLECTOR ELECTRODE PORTION UNIFORMLY DISTRIBUTED OVER THE ENTIRE SURFACE OF SAID VIEWING SEGMENT, SAID ELECTRODE PORTION BEING TRANSPARENT, A MOSAIC PATTERN OF DISCRETE PHOTOCONDUCTIVE AND INSULATIVE ELEMENTS TO FORM DISCRETE ISLANDS ARRANGED SUBSTANTIALLY IN THE SAME PLANE AND DISTRIBUTED OVER THE INNER SURFACE OF SAID ELECTRODE PORTION WHEN VIEWED FROM THE GUN, SAID ELEMENTS BEING ELECTRICALLY CONNECTED TO THE PORTION, MEANS TO CREATE AN ELECTRON BEAM EMANATING FROM THE GUN AND FLOODING THE ENTIRE TARGET WITH ELECTRONS, AND OPTICAL SHUTTER MEANS FOR MOMENTARILY EXPOSING SAID VIEWING SEGMENT TO AN OPTICAL IMAGE CONCURRENTLY WITH FLOODING THE TARGET WITH ELECTONS AND THEREBY CREATE A STORED CHARGE PATTERN ON THE INSULATIVE ELEMENTS, THE CHARGE ON EACH DISCRETE INSULATIVE ELEMENT BEING DIRECTLY RELATED TO THE INTENSITY OF ILLUMINATION OF THAT PORTION OF THE VIEWED IMAGE OPTICALLY IMPINGED ON THE ADJACENT PORTION OF THE VIEWING SEGMENT.