Color cathode-ray tube

A color cathode-ray tube comprising at least a panel portion having a phosphor screen on an inner surface thereof, a neck portion, a funnel portion connecting said panel portion and said neck portion, an electron gun housed in said neck portion, and a deflection yoke for scanning electron beams on the phosphor screen;

• wherein said electron gun includes:
• a main lens section comprising an anode to which an anode voltage is applied, and focus electrode, said focus electrode having a first type of focus electrode group to which a first focus voltage is applied, and a second type of focus electrode group to which a second focus voltage is applied, said second focus voltage being obtained by superposing on a predetermined voltage a voltage that changes depending upon a deflecting amount of the electron beams;
• between the first type of focus electrode group and the second type of focus electrode group at least two electron lenses being formed including a dynamic lens for focusing the electron beams in both the horizontal direction and the vertical direction and an electrostatic quadrupole lens;
• three electron beam passage holes are formed in electrodes which form said dynamic lens and centers for outer electron beam passage holes in the first type of focus electrode group are deviated relative to centers of outer electron beam passage holes in the second type of focus electrode group in the horizontal direction;
• and
• said electrostatic quadrupole lens exhibits different intensities for the outer electron beams relative to the center electron beam.