CRT Control grid having orthogonal openings on opposite sides

A cathode-ray tube comprising, in an evacuated envelope, a target and an electron gun for generating an electron beam directed onto said target, said electron gun including a cathode centered about a first axis, a first electrode disposed adjacent said cathode and spaced therefrom along said first axis, said first electrode having first aperture centered about said first axis, and a second electrode spaced along said first axis from said first electrode and having a second aperture centered about said first axis, said first electrode having, on the side of said first electrode adjacent said cathode, an elongated opening communicating with said first aperture so that said first electrode and said cathode from a non-rotationally symmetrical multipole electron lens which is mainly a first quadrupole lens and on the side of said first electrode adjacent said second electrode a second elongated opening communicating with said first aperture, the longitudinal axis of said second opening being perpendicular to the longitudinal axis of said first opening so that said first electrode and said second electrode form a non-rotationally symmetrical multipole electron lens which is mainly a second quadrupole lens rotated 90.degree. with respect to said first quadrupole lens.