Increased light output from color picture tubes through optical analogy

This paper describes how the optical analogy between the electron system in color picture tubes and the "lighthouse" exposure technique used in the manufacture of color screens was used to achieve more efficient utilization of tolerances. The "lighthouse" correction lens has been redesigned and tube geometry has been modified to correct the placement of the electron spot with respect to the phosphor dots. These changes permit an increase in tube light output without sacrifice of manufacturing tolerances. A detailed description of the "lighthouse" revisions and the changes in screen geometry is given.