声光可调滤波器(AOTF)是利用各向异性介质中声光作用原理工作的优良分光元件。通过介绍AOTF的工作原理，指出声光晶体中传播的超声波频率与衍射光波长之间一一对应的频率调谐关系；给出了不同情况下的频率调谐关系，并说明了二氧化碲声光材料的双折射特性和旋光特性等材料特性对频率调谐关系中的作用。讨论了光波长、入射光极角等参数对频率调谐关系产生综合影响的具体规律。

The acousto-optic tunable filter (AOTF) is a good prismatic element based on the acousto-optic interaction in anisotropic material. By introducing the working principle of AOTF, the frequency tuning relationship of the applied acoustic frequency in the crystal and the wavelength of the diffracted light is presented, the frequency tuning relationships under different conditions are given, and the function of the birefringence and rotatory property for the TeO2 crystal on the frequency tuning relationship is explained. The regulation how the parameters such as the optical wavelength and the incident polar angle influence the tuning relationship is discussed.