A Theory of Designing the Correction Lenses for Stripe Screen Picture Tubes

Abstract

This report introduces a theoretically strict process for designing correction lenses. The surface design requires the integration of the equations which express the surface gradient. However, these'gradient' equations are generally not compatible with each other. In stripe tubes, mislanding along the screen stripes ('allowable mislanding') fortunately does not affect picture quality. Therefore, by controlling the allowable mislanding appropriately, we can make the above gradient equations compatible. The problem is fixing the distribution of this allowable mislanding. To derive an equation for determining the distribution I employed basic theorems in geometrical optics directly. Next, I applied the obtained result experimentally to the process of integrating the gradient equations and proved that compatibility had been achieved.