非合作目标相位式激光测距接收光功率的模型建立

Model of the received power in non cooperative target phase shift laser rangefinder

在相位式激光测距中，接收光功率的大小直接决定了测量信噪比，从而决定了测量范围和测量精度，因此如何准确地计算出接收光功率的大小，是测距技术中一个非常重要的问题。对普遍使用的计算接收光功率公式的适用范围进行了讨论，指出了其不适用于非合作目标短距离测量的原因。提出了适于非合作目标相位式激光测距的计算接收光功率的新方法，推导了计算公式，并进行了仿真计算。

In phase shift laser rangefinder, the received power determines the signal to noise ratio, conse quently the depth of field and the accuracy, so it is of importance to calculate the received power accurately. The application of the generally used expression is discussed. The reason of which is not suitable to non cooperative rangefinder is pointed out. A new method is brought forward to calculate the received power, formula is deduced and emulational a calculation is made.