论述了自行研制的半导体激光雷达能见度仪的工作原理、基本结构及参数, 提出了一种稳定的消光系数迭代算法。利用该半导体激光雷达能见度仪与美国Belfort model 6230A 型能见度仪对水平及斜程能见度进行了对比实验。对比实验表明：对于水平能见度, 平均相对误差在10%以内的占总量的45.6%, 平均相对误差在20%以内的占总量的84.7%, 平均相对误差在30%以内的占总量的91.2%；对于斜程能见度, 不同天气条件下, 能见度变化趋势明显, 反映了斜程能见度与水平能见度探测的差别与意义。充分说明该能见度仪能够在各种气候条件下测量水平及斜程能见度, 所提出的反演能见度的迭代算法稳定可靠。

The principle, structure and parameters of the diode-laser lidar used to measure visibility were introduced, and a steady iteration algorithm was proposed to calculate the extinction coefficient. The intercomparison experiment with this lidar and the Belfort model 6230A made in America was conducted for horizontal and slant visibility detection. The results show that the possibilities of average relative error below 10%, 20% and 30% for horizontal visibility measurements are 45.6%, 84.7% and 91.2%, respectively. For slant visibility measurement, the change of the visibility is obvious, which demonstrates the difference and significance of the slant and horizontal visibility measurements on various weather conditions. It is sufficiently shown that this lidar system is capable of measuring the slant and horizontal visibility on various weather conditions, and the proposed iteration method is stable and reliable.