Positive or negative high gain image amplifier

Claim 1

A LIGHT AMPLIFIER HAVING A REVERSIBLE GAIN FACTOR AND COMPRISING FIRST AND SECOND LAMINAR STRUCTURES, SAID FIRST LAMINAR STRUCTURE HAVING A TRANSPARENT CONDUCTIVE INPUT LAYER, A PHOTOCONDUCTIVE LAYER, AN INTERMEDIATE CONDUCTIVE LAYER, AND AN ELECTRON EMISSIVE CATHODE LAYER; SAID SECOND LAMINAR STRUCTURE HAVING A PHOSPHOR LAYER AND A TRANSPARENT CONDUCTIVE OUTPUT LAYER; AN EVACUATED ENVELOPE HAVING FIRST AND SECOND TRANSPARENT PORTIONS, SAID LAMINAR STRUCTURES BEING POSITIONED WITHIN SAID EVACUATED ENVELOPE WITH SAID INPUT AND OUTPUT LAYERS IN LIGHT TRANSMITTING RELATION TO SAID FIRST AND SECOND TRANSPARENT PORTIONS, RESPECTIVELY, AND WITH THE CATHODE LAYER OF SAID FIRST LAMINAR STRUCTURE SEPARATED BY A GAP FROM THE PHOSPHOR LAYER OF SAID SECOND LAMINAR STRUCTURE, MEANS FOR MAINTAINING SAID OUTPUT LAYER AT A POSITIVE POTENTIAL WITH RESPECT TO SAID INTERMEDIATE CONDUCTIVE LAYER, AND MEANS INCLUDING A VOLTAGE SOURCE IN SERIES WITH SAID INPUT LAYER AND RESISTANCE MEANS IN PARALLEL WITH SAID INPUT LAYER AND SAID SOURCE FOR ESTABLISHING A POTENTIAL DIFFERENCE ACROSS SAID PHOTOCONDUCTOR LAYER, AND MEANS FOR REVERSING THE EFFECTIVE POLARITY OF THE VOLTAGE SOURCE.