Inline type electron gun for color cathode ray tubes

In an inline type electron gun having an electrode assembly for focusing electron beams on a screen of a cathode ray tube, the assembly comprising first through eighth electrodes in order starting from a cathode, which cathode emits the electron beams, the third, fourth, and fifth electrodes forming a first unipotential lens, the fifth, sixth, and seventh electrodes forming a second unipotential lens, and the seventh and eighth electrodes forming a bipotential focusing lens, wherein the fifth, sixth, and seventh electrodes each have a central aperture and two lateral apertures formed therein, the central aperture of each of the fifth, sixth, and seventh electrodes being aligned and respective lateral apertures of each of the fifth, sixth, and seventh electrodes being aligned, the improvement wherein the seventh electrode comprises electric field biasing means for forming an anisotropic electric field at the two lateral apertures thereof to deflect the electron beams passing therethrough toward the central electron beam passing through the central aperture thereof, before the electron beams enter the bipotential focusing lens, and wherein the central aperture and the two lateral apertures in the seventh electrode are formed at a face which opposes the sixth electrode.