通过惠更斯原理仿真通过平行光通过圆形孔达到观察平板上的光强分布，采用数值方法积分，可以观察固定孔径的强度分布或者固定位置的强度随孔径变化情况。-Huygens'　principle by simulation by parallel light reaches light observation through a circular hole on the plate intensity distribution, numerical integration methods, we can observe the distribution of intensity or strength of the fixed aperture fixed position with the aperture changes.