基于不同FFT算法的方形环带菲涅耳衍射场分布  

Distribution of Fresnel diffraction field of square girdle calculated using different FFT algorithm

作　　者：韩振海[1] 

机构地区：[1]河西学院物理与机电工程学院,甘肃张掖734000

出　　处：《物理实验》2015年第11期32-36,共5页Physics Experimentation

摘　　要：利用标量衍射理论和快速傅里叶变换方法,对平面光波通过方形环带产生的衍射场进行了计算机模拟实验.模拟实验采用了3种不同的FFT方法,比较分析了其对应的衍射结果有所不同,并和实际的衍射实验结果进行了对比,进一步验证了相关文献中与选择算法有关的衍射特征距离判据.Based on scalar diffraction theory and fast Fourier transform, a computer simulation ex- periment was carried out on the diffraction field of square girdle illuminated by plane wave. In the ex- periment, three different FFT methods were used to compare and analyze the corresponding results, and the experimental results were compared with the actual results of the diffraction experiments, and characteristic distance criterion was verified.

关 键 词：方形环带 菲涅尔衍射 傅里叶变换 计算机模拟 

分 类 号：O436.1[机械工程—光学工程]