大气消光特性与机载激光雷达眼睛安全关系的研究

依据美国ANSI标准，定量分析了气溶胶、卷云和沙尘的垂直消光特性对机载激光雷达激光脉冲眼睛安全最大阈值能量的影响；以地基激光雷达探测得到的合肥上空沙尘暴为例，定量给出了大气中各成分消光特性对飞机眼睛安全最低高度的影响；模拟计算了各种大气成分的消光特性对激光脉冲眼睛安全系数的影响随高度的变化规律。计算结果表明：沙尘层对激光脉冲眼睛安全最大阈值能量的影响幅度可达几十毫焦。该结果为我国第一台机载大气探测激光雷达激光脉冲能量设置提供了基本依据。

Relationship between atmosphere extinction feature and eye safety of airborne atmosphere detection lidar

The effect of the vertical extinction characteristics of aerosol, cirrus and dust on laser pulse maximal threshold energy of the airborne lidar for eye safety is analyzed quantitatively according to U.S.A. ANSI standard. Airplane minimum altitude for eye safety was calculated and analyzed quantitatively according to the dust detected by the ground-based lidar in Hefei. The variation rule of laser pulse eye safety coefficient with altitudes was simulated and calculated with the characteristics of all kinds of atmospheric compositions detected by airborne lidars. The calculation result indicates that the influence amplitude of the dust on laser pulse maximum threshold energy for eye safety reaches tens of millijoules. The conclusion forms a baseline for the maximal energy setting of 532nm & 1064nm laser pulse for the airborne lidar design for eye safety.