高能激光器谐振腔中，介质折射率随温度、压力、能量等物理量沿径向变化而呈类透镜分布，由此引起激光振荡特性的改变，产生动态的类透镜介质像差，根据光波的矩阵传输理论，以正支共焦望远型非稳腔为例，用几何方法对激光谐振腔内的类透镜介质效应及其像差校正进行了理论分析，计算结果显示，所给方法能有效消除该像差。 High-energy laser resonator, the medium refractive index changes with the radial, such as temperature, pressure, energy and other lens-like distribution, resulting in changes in laser oscillation characteristics, resulting in dynamic lens-like medium aberration, according to the matrix of light wave transmission Theory, taking the orthokent confocal telescopic unstable cavity as an example, the geometrical method is used to theoretically analyze the lens-like effect and aberration correction in the laser cavity. The calculation results show that the proposed method can effectively eliminate the aberration .