子波叠加算法实现方孔菲涅耳衍射的仿真

Simulation for Realizing Fresnel Diffraction of Square Aperture Based on Coherence Superposition of Wavelets Algorithm

运用数值计算方法对方孔的菲涅耳衍射进行分析和仿真,基于菲涅耳衍射积分和子波的相干叠加法,设计了一种针对方孔菲涅耳衍射的数值算法,并给出了相应的MATLAB程序以及仿真结果.从数值分析结果可以直观而明确地看到,菲涅耳衍射场的光强分布完全由菲涅耳数决定.并对菲涅耳衍射过渡到夫琅禾费衍射时的菲涅耳数的取值进行了讨论.

The intensity distribution of Fresnel diffraction field for square aperture are analyzed and simulated through numerical method. A high performance algorithm of numerical calculations for square aperture diffraction and corresponding MATLAB programs and simulations are presented. The results indicate that the intensity distribution of diffraction light field is determined by Fresnel Number. And the value of Fresnel Number on transition from Fresnel diffraction to Fraunhoer diffraction is discussed.