www.gusucode.com > 基于MATLAB仿真的新算法针对光源空间相干性的研究 > 基于MATLAB仿真的新算法针对光源空间相干性的研究\文件说明.txt

    本文以杨氏双缝实验为基础,旨在探究光源空间相干性对干涉的影响情况。首先将光源空间展宽问题等效为平行光照射具有宽度的双缝的问题,再将两缝近似为离散化的多个次光源点阵列,每相邻点间距非常微小。本文从光矢量叠加原理出发,推导出一种新的算法。该算法以两缝中每一对次光源点作为干涉单元,分别求出各单元在每一个观测点处的干涉光强,再对所有单元的干涉光强线性叠加,算出观测点的总光强。最后利用MATALB仿真方式模拟出了不同缝宽下,单色平行光、高斯光谱、矩形光谱分别垂直照射双缝时的光强分布情况。通过模拟结果的对比发现,双缝展宽对条纹衬比度的影响远甚于光谱展宽。本文所提出的新算法简化了计算过程,也极大地提高了程序运行速度。 Based on the Young's double-slit experiment, this paper aims to explore the influence of the spatial coherence of the light source on the interference. First, the problem of spatial widening of the light source is equivalent to the problem of double slit with parallel width, and then the two slits are approximately separated from each other. The distance between each adjacent point is very small. In this paper, a new algorithm is derived from the principle of light vector superposition. The interference light intensity of each unit at each observation point is obtained by using each pair of sub-source points in the two joints as the interference unit. Then, the interference intensity of all the units is linearly superimposed, and the total light intensity The Finally, the distribution of light intensity in single seam parallel light, Gaussian spectrum and rectangular spectrum were measured by MATALB simulation method. Through the comparison of the simulation results, it is found that the effect of double slit width on the ratio of stripes is far more than that of spectral broadening. The new algorithm proposed in this paper simplifies the calculation process and greatly improves the speed of the program.