| 摘要 |
A cathode ray tube comprises an envelope, an electron gun having a beam limiting aperture, a first electrode, a second electrode, a third electrode and a mesh electrode, the first, second and third electrodes constituting electrostatic lens system to focus the electron beam, the second electrode being a deflection electrode of arrow or zig-zag patterns to deflect the electron beam, wherein if distance between the beam limiting aperture and the mesh electrode is l, length of the second electrode is made (1/3 l-1/10 l) and (1/3 l+1/10 l), and distance between the beam limiting aperture and the center of the second electrode is made (1/2 l-1/3 l) to (1/2 l).
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