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偏移迭加的基本原理在有关的杂志上已作了介绍,这里只简单的谈一下。根据惠更斯——菲涅尔原理,当地震波到达一个反射界面时,该界面上任意一点 P都可以看成为新震源(绕射点源)。波以此点为中心,成球面波向四周传播(图1)。由此,推广开来,则可以认为,在地面上任意一点接收到的地震脉冲,就是反射界面上所有点源产生的绕射波在接收点上迭加干涉的总和(图2)。
The basic principle of offset superimposed in the magazine has been introduced, here is a simple talk about. According to the Huygens-Fresnel principle, when a local seismic wave reaches a reflection interface, any point P on the interface can be regarded as a new source (diffraction point source). Wave to this point as the center, into a spherical wave spread around (Figure 1). Thus, if we generalize it, we can assume that the seismic pulse received at any point on the ground is the sum of the interferences that are generated by all the point sources on the reflection interface at the receiving point (Figure 2).