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METHOD OF PROTECTION OF LUMINOPHORE ON PICTURE TUBE,ESPECIALLY TV TUBE SCREEN,OR THE LAYER ON LIGHT-SENSITIVE PLATE OF PICK-UP TUBE AGAINST BURNING OUT AT PARTIAL OR COMPLETE COLLAPSE OF MAGNETIC FIELD OF ELECTRON BEAM DEFLECTION
METHOD OF PROTECTION OF LUMINOPHORE ON PICTURE TUBE,ESPECIALLY TV TUBE SCREEN,OR THE LAYER ON LIGHT-SENSITIVE PLATE OF PICK-UP TUBE AGAINST BURNING OUT AT PARTIAL OR COMPLETE COLLAPSE OF MAGNETIC FIELD OF ELECTRON BEAM DEFLECTION
