摘要
本文从单色线光源的光强分布出发，探讨了在一般情况下，光源的线度与谱宽对干涉条纹可见度的影响，并以杨氏双缝干涉为例，得到干涉条纹可见度随光源线度和谱宽均按ＳｉｎＣ函数规律变化的结论。
Based on the intensity distribution of monochromatic light source, this paper ex-plores the effect of light source dimension and spectnim width on the visibility of interfer-ence fringe under common circumstances and the author offers the example of Young'sTwo Split Interference to reach the conclusion that the visibility of interference fringe va-ries with light source demension and spectnim width according to the regularity of sincfunction.
关键词
光源线度
谱宽
条纹可见度
干涉
light source dimension,spectrum width, the visibility of interferencefringe
