振幅型二维点阵光栅Talbot效应的实验研究  

Experimental Study on Talbot Effect of Two Dimensional Amplitude Lattice Grating

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：《激光杂志》2016年第6期64-66,共3页Laser Journal

摘　　要：利用标量衍射理论和快速傅里叶变换(FFT)方法,对平面光波照射振幅型二维点阵光栅产生的自成像规律进行了计算机模拟实验分析。模拟实验得到了当衍射距离分别为整数Talbot距离,以及1/2、1/3、1/4等分数Talbot距离时,光栅衍射光强分布以及衍射图样的空间周期,模拟实验的结果与理论分析的结果相吻合。Using the scalar diffraction theory and the fast Fourier transform（ FFT） method,a computer simulation experiment is carried out to analyze the self-imaging of the two-dimensional amplitude lattice grating illuminated by planar optical wave. The diffraction intensity distribution and the spatial period of the diffraction pattern are obtained when the diffraction distance is an integer Talbot distance,as well as the 1 /2,1 /4,1 /3 Talbot distance. The simulation results are in agreement with the results of theoretical analysis.

关 键 词：点阵光栅 TALBOT效应 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]