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引入Ｂ３样条曲面片拟合目标外形，然后利用物理光学（ＰＯ）技术分析由Ｂ３样条曲面构成的目标的雷达散射截面（ＲＣＳ）。若干算例表明此方法计算结果与几何光学（ＧＯ）法计算结果吻合很好，说明了将Ｂ３样条曲面建模应用到复杂目标ＲＣＳ计算的建模中是可行的。
The B3 spline patch is introduced to fit the target shape, and then the target RCS of the B3 spline surface is analyzed by the physical optics (PO) technique. Several examples show that the calculated results of this method are in good agreement with the results of the geometrical optics (GO) method, which shows that it is feasible to apply B3 spline surface modeling to the modeling of complex target RCS.