一、同心透镜场曲的变化可看作是系统视场边缘像点和轴上像点的某种位移,其各点的位移量是不同的。当初始系统的位置固定时,像的位移将与某个光焦度的增补有关。当然,这里初始系统像差的改变,一般是可预料的。对那些已经校正像散的彗差的基础系统来说,希望这些像差的校正不再受到破坏。这时,当初始的基础系统存在负的场曲时,可把 First, the concentric lens field curvature changes can be seen as the edge of the system field of view image point and the axis of a certain displacement, the displacement of each point is different. When the position of the initial system is fixed, the displacement of the image will be related to the addition of a certain power. Of course, the change of the initial system aberration here is generally predictable. For those fundamental systems that have corrected astigmatic coma, it is hoped that these aberrations will no longer be corrupted. At this time, when the initial base system negative field curvature, you can put