摘要
针对雨滴衰减严重影响激光引信探测的问题,基于夫琅禾费衍射和几何光学散射理论,建立雨滴对532nm和1 064nm激光传输衰减模型。以Gamma分布作为雨滴谱,分析计算了两种波长激光在不同降雨量下的衰减特性。分析表明,不同波长的激光的吸收损耗差异很大,虚部越小吸收作用越不明显。
Aiming at the serious attenuation of laser fuze detection by raindrop, based on the Fraunhofer Diffraction and the theory of geometrical optic scattering, a model of the transmission attenuation of 532 nm and 1 064 nm laser beam is set up. Then set the Gamma distribution as the raindrop spectrum, the attenuation characteristics of two different wavelength of laser under different rainfall are calculated. Theoretical analysis shows that different wavelengths of laser have different absorption loss. The smaller inscriber the less absorptive action will be, the less differences between them will be.
出处
《制导与引信》
2015年第4期9-12,19,共5页
Guidance & Fuze
关键词
图像
目标检测
衰减
image
target detection
attenuation