Abstract: An electrostatic deflection-type camera tube has the following advantages: The small electron beam spots over the entire the scanned area provide uniform and high resolution picture, normal beam landing performance and deflection linearity are also excellent. The purpose of the paper is to .give the field calculation for focus deflection system of a camera tube with electrostatic deflection yokes.

Key words: camera tube, electrostatic denection, electrostatic focus, electrostatic field