Kameyama Shumpei, Ando Toshiyuki, Asaka Kimio, Hirano Yoshihito
Information Technology R&D Center, Mitsubishi Electric Corporation, Japan.
Appl Opt. 2010 Sep 20;49(27):5169-74. doi: 10.1364/AO.49.005169.
We present a semianalytic pulsed coherent laser radar (CLR) equation for coaxial and apertured systems. It combines the conventional CLR equation, numerical Fresnel integration (NFI), and nearest Gaussian approximation, using correction factors that correspond to beam truncation. The range dependence of the signal-to-noise ratio obtained by this semianalytic equation was found to agree well with the precise NFI solution for not only the focal range, but also the near-field range. Furthermore, the optimum beam truncation condition depending on the atmospheric refractive index structure constant is shown. The derived equation is useful for precisely predicting the CLR performance simply by its semianalytic expression.
我们提出了一种用于同轴和有孔径系统的半解析脉冲相干激光雷达（CLR）方程。它结合了传统的CLR方程、数值菲涅耳积分（NFI）和最近高斯近似，使用与光束截断相对应的校正因子。发现通过该半解析方程获得的信噪比的距离依赖性不仅对于焦区，而且对于近场区都与精确的NFI解非常吻合。此外，还给出了取决于大气折射率结构常数的最佳光束截断条件。所推导的方程通过其半解析表达式对于精确预测CLR性能很有用。
