Optical correction in manufacture of color image reproducers

Claim 1

IN THE ART OF MANUFACTURING A CATHODE-RAY TUBE OF THE TYPE WHICH REQUIRED DYNAMIC CONVERGENCE CORRECTION AND CONTAINS A COLOR-SELECTION ELECTRODE HAVING A MULTIPLICITY OF SYSTEMATICALLY ARRANGE APPARATUS THROUGH WHICH A PLURALITY OF ELECTRON-BEAM COMPONENTS PASS ALONG DIFFERENT ANGULARLY RELATED PATHS, IN TRANSIT FROM RESPECTIVE COLOR-CENTERS LOCATED AT RESPECTIVE PREDETERMINED POINTS WHICH ARE RADIALLY SPACED FROM THE LONGITUDINAL AXIS OF SAID TUBE AND DISPOSED IN A PLANE-OF-DEFLECTION SUBSTANTIALLY PERPENDICULAR TO SAID TUBE AXIS, TO IMPINGE UPON RESPECTIVE SUB-ELEMENTAL AREAS OF RESPECTIVELY DIFFERENT COLOR-RESPONSIVE CHARACTERISTICS ON THE MOSAIC SURFACE OF A NEARBY FLUORESCENT SCREEN, THE PROCESS OF PRODUCING A FLUORESCENT SCREEN COMPRISING SUCH SUB-ELEMENTAL AREAS ARRANGED ON A SUPPORT IN A SELECTIVELY DISTORTED PATTERN TO COMPENSATE FOR AN EFFECTIVE SHIFT OF POSITION OF SAID PLANE-OF-DEFLECTION ALONG SAID AXIS, SAID SHIFT VARYING IN AMOUNT WITH DEFLECTION OF SAID ELECTRON-BEAM COMPONENTS AND BEING OF A MAXIMUM AMOUNT $C, AND ADDITIONALLY TO COMPENSATE SIMULTANEOUSLY FOR AN EFFECTIVE CHANGE OF POSITION OF SAID COLOR CENTERS IN A DIRECTION RADIALLY OF SAID AXIS, SAID CHARGE VARYING IN AMOUNT WITH SAID DYNAMIC CONVERGENCE AND BEING OF A MAXIMUM AMOUNT $A, WHEREBY SAID ELECTRON-BEAM COMPONENTS CENTRALLY IMPINGE UPON THEIR RESPECTIVE SUB-ELEMENTAL AREAS OVER SUBSTANTIALLY THE ENTIRE AREA OF SAID FLUORESCENT SCREEN, SAID PROCESS COMPRISING: PROVIDING SAID SUPPORT WITH A COATING OF MATERIAL SENSITIVE TO LIGHT ENERGY, PRO-