激光遥感探测装置固有特性的观测与分析

Observation and Analysis of Inherent Characteristics of Laser Remote Sensing Detection Device

利用激光多普勒技术,对激光遥感探测装置的固有特性进行了观测与分析,结果表明:探测装置由于参考光路和测量光路存在固定的光程差,探测器输出的电信号波形按固定的多普勒频率变化,同时波形因探测装置的微弱振动以及外界环境气流的变化,在这些因素的共同作用下产生随机叠加相位.另外,通过冲激响应观察到了探测系统所得波形具有对称形态特性并对其进行了分析.

The laser Doppler technology was used to observe and analyze the inherent characteristics of the detection device.The results show that the detection device has a fixed optical path difference between the reference light path and the measurement light path,and the electrical signal waveform output by the detector is at a fixed Doppler frequency.At the same time,due to the weak vibration of the detection device and the change of the external ambient airflow,a random superimposed phase is generated under the combined effect of these factors.In addition,the impulse response was used to observe that the waveform obtained by the detection system has symmetric morphological characteristics and analyzed it.