DEVICE FOR CORRECTING THE DEFLECTION EFFECT DUE TO A VARIATION OF THE FOCUSING VOLTAGE IN A TRICHROMATIC CATHODE RAY TUBE WITH IN LINE CATHODES

摘要

To avoid the deflection phenomenon of the red and blue spots of a trichromatic tube with in line cathodes, as a function of a variation of the focusing voltage, the holes corresponding to these two colors are enlarged over a distance of about 0.1 to 0.2 mm.