分子光谱深刻地反映着分子内部和分子间所进行的各种物理过程以及分子结构方面的各种特征,因此分子光谱法是人们认识分子结构、分子内部和分子间运动规律的重要手段,对于解决各种分析问题是比较有效的。近四十年来,人们对双原子分子光谱进行了系统的研究,在丰富的实验基础上建立了一套比较完整可靠的理论。在多原子分子光谱方面,也有了相当的基础。四十年代中期,自动记录的双光束红 Molecular spectroscopy profoundly reflects various physical processes and molecular structures in and between molecules. Therefore, molecular spectroscopy is an important means to recognize molecular structure, intramolecular and intermolecular motions. Various analytical problems are more effective. In the recent four decades, people have made a systematic study of diatomic molecular spectra, and established a set of more complete and reliable theories on the basis of abundant experiments. In the polyatomic molecular spectrum, there is also a considerable basis. The mid-forties, automatic recording of double light red