薄膜干涉条纹定域和形状问题的讨论

Discussion of Domain and Pattern of Film Interference Fringe

基于薄膜干涉光程差公式，介绍了干涉条纹的定域和形状与薄膜厚度、光线入射角、照明光源的类型、条纹观察方式等因素的连带关系，并着重讨论了面光源照明、眼睛观察时，既非等厚又不是等倾干涉情况下的条纹形状问题。

Based on the formula of optical path difference of film interference, we reach a conclusion that the domain and pattern of interference fringe are related to film thickness, incident angle of optieal beam, lighting optical source, and other factors. Still further, we tocus on the fringe pattern under the circumstance of neither equi-thickness nor equi-dip interference when lit by a surface lighting and observed by eyes.