focusing electrode

focusing electrode

[′fō·kəs·iŋ i‚lek‚trōd]
(electronics)
An electrode to which a potential is applied to control the cross-sectional area of the electron beam in a cathode-ray tube.
References in periodicals archive ?
The focusing action is brought about by a pair of grids which separate the time-of-flight and focusing electrodes each of which is set at about 18 kV to 20 kV.