| 摘要 |
PURPOSE:To reduce the top aberration while to eliminate the spool distortion at the left and right of the picture face and to improve the deflection sensibility, by forming approximately uniform field at the neck portion of core while strong barrel shaped field at the intermediate portion and strong spool shaped field at the opening portion. CONSTITUTION:The coil 1a is arranged nonlinearly such that the winding angles theta1, theta2, theta3 at the neck portion, intermediate portion and the opening portion of the coil 1a at the inside of a core 2 have such relation theta2>theta1>theta3 or the angles alpha1, alpha2, alpha3 at the center of gravity of coils at each portion have such relation alpha2>alpha1> alpha3. The coil 1h at the outercircumference of the core 2 is arranged linearly different from the coil 1a. |
