粗糙平面的激光散射特性研究

Research of laser scattering from random rough plane surfaces

为了检测目标的边缘信息,采用激光扫描目标表面、通过回波信号变化来得到目标的边缘信息的方法,利用随机面元模型,分析了刚性随机粗糙平面的激光散射特点,建立了实用化的随机粗糙平面激光散射理论模型,并给出了正入射时几种情况下的激光散射图像,分析了平面目标的激光散射能量计算方法,仿真了光束在平面目标表面做正弦摆动时,光斑在不同位置的反射能量,利用激光信号的强度变化,采用峰(谷)检出法或者过零检出法就可以得到物体的边缘信息。结果表明,通过回波信号的变化,可以得到目标的边缘轮廓。

In order to test the edge of a target, the method of laser scanning, with which the target profile can be measured by detecting the change of return laser energy, was introduced. The random facet model was employed to establish the rough plane scattering theory, based on which the intensity distribution of the scattered laser from random rough plane surfaces can be calculated. By means of peak （valley） value detection or across-zero detection, the edge message of target can be obtained. The results prove that the proposed approach is effective on the detection of target profiles.