We analyzed in detail the " absorption boundary condition " of the electromagnetic wave and generalized the " 2d pic lindman absorption boundary condition " to adapt to all kinds of polarization modes and 3d case 对“吸收边界”条件作了系统的分析，将lindman吸收边界条件作了推广，使之适用于各种极化条件以及3dpic粒子模拟。
