Graphotron precision high resolution CRT display

The GRAPHOTRON is a uniform high resolution, high brightness CRT display which provides a high speed sub raster for character generation and is capable of 5000 line resolution and geometrical accuracy of 0.01%. This paper outlines the cathode ray tube and associated focus-deflection component characteristics required to achieve a precision high resolution display for electronic photocomposition, graphic reproduction, flying spot scanner, computer readout and similar applications. Correction of electron beam distortions due to focusing and deflection and a variety of geometric distortions including radial nonlinearity, nonorthogonality, center line bow, sub raster distortions and other pattern errors introduced by deflection and optical components will be discussed.