建立圆环形聚焦平面光束通过Kolmogorov湍流大气的远场传输模型，考虑实际CCD所存在的“死区”及非线性饱和效应等非线性光电响应特征，以中心遮拦比为0.5的圆环形聚焦光束为例，分别计算了其通过不同强度湍流大气传播至远场焦平面上的实际真实远场光强分布曲线和CCD测量远场光强分布曲线，并以峰值斯特雷尔比RS、光束质量因子β和环围能量比Ree三种参数作为评价远场光斑质量的指标，考察了死区大小以及光斑非线性饱和程度对实际远场光强分布的测量和光束质量评估的影响，对计算结果以及减小测量误差的解决途径进行了分析讨论。

The far-field propagation model of annular plane beam through Kolmogorov atmospheric turbulence is presented and the nonlinear response characterization, such as so called "dead zone" and nonlinear saturation effect of CCD sensor are considered as well, the theoretical far-filed irradiance profiles of annular beam with obscuring ratio 0.5 under different turbulence strengths and their corresponding measurement results with CCD are calculated. The parameters of peak Strhel ratio RS, beam quality factor β and encircled energy ratio Ree are taken as evaluating far-field spot quality. The influence of dead zone and nonlinear saturation effect of CCD on measurement results of far-field spot profile and beam quality are analyzed, and the approaches to eliminate the measurement errors are discussed.