场偏转线圈的构造特点:场偏转线圈的绕组是绕在铁淦氧磁芯上的,为了使偏转线圈在管颈内产生的磁场均匀一致,减小光栅的几何失真,场偏转线圈应按余弦分布的原则来绕制,即中间密集两边逐渐变疏。但笔者还见到有的偏转线圈绕制方式正相反,即中间稀疏而两边密集。因此,如果线圈需要重新绕制,必须 Field deflection coil structure and characteristics: Field deflection coil winding is wound on the ferrite core, in order to make the deflection coil in the neck uniform magnetic field generated to reduce the geometric distortion of the grating, the field deflection coil should be cosine Distribution of the principle of winding, that is, the middle of dense gradually narrowing on both sides. However, the author also saw that the winding mode of some deflection coils is the opposite, that is, the middle is sparse and the two sides are dense. Therefore, if the coil needs to be rewound, it must be