非单色性光源对杨氏干涉条纹可见度的影响

The Influence of Non Monochromatic Light Source on the Young Interference Fringe Visibility

光源的单色性影响其相干性.任何实际的波列都有一定的谱线宽度,谱线宽度表示了光源单色性的好坏,直接影响了干涉条纹的可见度.对非单色性光源通过典型杨氏双缝干涉装置产生干涉条纹的理论进行分析和仿真,得出谱线宽度与干涉条纹的可见度的关系.结论与实验相吻合.其结果对于干涉法工程测量具有现实意义.

The monochromatic light source affects its coherence.The visibility of interference fringe was directly affected by linewidth.what generally comprise wave trains shows light source quality.In this paper,Young＇s double— slit interference device produces interference fringes by Non — monochromatic light source is analysed and simulated,It＇s show that the Relationship between Spectral Line Width and Visibility of Interference,from which we obtain the following conclusions.It＇s a result for the light interfering method has the realistic meaning.