Hao Qun, Cao Jie, Hu Yao, Yang Yunyi, Li Kun, Li Tengfei
Opt Express. 2014 Jan 13;22(1):563-75. doi: 10.1364/OE.22.000563.
A pulsed-laser range finding based on differential optical-path is proposed, and the mathematical models are developed and verified. Based on the method, some simulations are carried out and important conclusions are deduced. (1) Background power is suppressed effectively. (2) Compared with signal-to-noise ratio (SNR) of traditional method, SNR of the proposed method is more suitable than traditional method in long-range finding and large tilt angle of target. (3) No matter what the tilt angle of target is, it always has optimal sensitivity of zero cross as long as the differential distance is equal to the light speed multiplied by the received pulse length and there is an overlap between two echoes.
提出了一种基于差分光程的脉冲激光测距方法，并建立和验证了数学模型。基于该方法进行了一些仿真，并得出了重要结论。（1）有效抑制了背景功率。（2）与传统方法的信噪比（SNR）相比，该方法的SNR在远距离测距和目标大倾斜角情况下比传统方法更适用。（3）无论目标的倾斜角如何，只要差分距离等于光速乘以接收脉冲长度且两个回波之间存在重叠，就始终具有零交叉的最佳灵敏度。
