观察到碘分子在光谱线514.5nm感应作用下的荧光谱,同时得到了在514.5nm附近碘分子的激发光谱。这两种谱的测量和研究表明,两能极模型对碘分子是一个很好的近似,普通光感应的碘分子荧光谱明显不同于激光感应的碘分子荧光谱。 在上面测量和研究的基础上,建立了新的物理模型以应用到激光感应荧光测量技术中。在488.0～544.0nm间,观察到了碘分子的激光感应荧光。 Fluorescence spectrum of iodine molecule was observed under the action of 514.5 nm spectral line, and the excitation spectrum of iodine molecule near 514.5 nm was obtained. Measurement and research of these two spectra show that the two-energy polar model is a good approximation of iodine molecule. The fluorescence spectrum of iodine molecule with ordinary light-induced fluorescence is obviously different from that of laser-induced iodine molecular fluorescence spectrum. Based on the above measurements and studies, a new physical model was established for application to laser-induced fluorescence measurement. Between 488.0 and 544.0 nm, laser-induced fluorescence of iodine molecules was observed.