To calculate the transfer matrix in the fringe region of a quadrupole lens, three kinds of methods are used.
文中阐述了四极磁透镜边缘场的三种处理方法，用这三种方法计算了透镜的输运矩阵。
2
The entire system is composed of computer, PC bus interface card, decode instrument, video switches matrix, audio switches matrix, pan, lens and alarm control etc.
整个系统由微机、PC总线适配卡、解码器、视频切换矩阵、音频切换矩阵、云台镜头和报警控制等部分组成。
3
Moreover, applying the matrix method in the close axis optics leads directly to the expression of the focal distance of magnetic lens if the matrix is transmitted by the lens.