机载大气探测激光雷达人眼安全分析
Analysis on eye safety of airborne atmosphere detection lidar and eye safety
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摘要: 依据美国ANSI标准，模拟计算了0~12 km的高度范围内不同的激光束发散角和不同激光脉冲能量比例的532和1 064 nm激光脉冲人眼安全最大阈值能量。给出两种532和1 064 nm激光脉冲人眼安全最大阈值能量分配方案：(1)激光束发散角为0.3 mrad且532与1 064 nm的激光脉冲最大阈值能量之比为1∶2；（2）激光束发散角为0.4 mrad且532与1 064 nm的激光脉冲最大阈值能量之比为1∶1。分析了用这两种激光脉冲人眼安全最大阈值能量分配方案探测模式大气时所对应的信噪比。分析结果表明：这两种方案既能保证机载激光雷达对模式大气探测时地面人眼安全又能达到探测所要求的信噪比。
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关键词:
- 大气光学 /
- 机载激光雷达 /
- 激光脉冲人眼安全阈值能量 /
- 人眼安全系数 /
- 信噪比
Abstract: According to American ANSI criterion, different laser pulse divergence angle and laser pulse’s eye-safe maximal energy ratio in altitude of 0 to 12 km are simulated. Two schemes about laser pulse’s eye-safe maximal energy distribution of 532 nm and 1 064 nm wavelength are provided: (1) laser beam divergence angle is 0.3 mrad, maximal threshold energy ratio of 532 and 1 064 nm lasers is 1∶2. (2) laser beam divergence angle is 0.4 mrad, maximal threshold energy ratio of 532 and 1 064 nm lasers is 1∶1. Signal-to-noise ratio for mode atmosphere detection using the two schemes are also analyzed. Analysis shows that the two schemes can ensure both eye safety on the ground and measuring quality. -
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