矩形空间滤波器的SFV空间滤波特性  

SFV spatial filtering characteristics of rectangle spatial filter

作　　者：郑丽娜[1] 李延伟[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《红外与激光工程》2013年第S02期472-475,共4页Infrared and Laser Engineering

基　　金：国家973计划(2009CB724001)

摘　　要：从数学角度对矩形空间滤波器的窄带通空间滤波特性进行了研究。以空间滤波测速法(SFV)为基础,对矩形空间滤波器的滤波特性、滤波器的关键参数选择进行了研究,介绍了空间滤波测速的原理和特性,并从数学角度对图像光强分布的空间滤波效应进行了介绍;通过研究矩形空间滤波器的功率谱密度函数,对影响空间滤波特性的影响因素进行了讨论,包括窗口区域的尺寸和形状以及狭缝个数等。分析结果对于优化空间滤波器的参数设计从而提高测速精度来说具有较强的理论指导意义。The characteristics of narrow band filtering of rectangle spatial filter were discussed mathematically . The filtering characteristics and key key parameters of rectangle spatial filter were studied based on SFV . The principal of spatial filtering velocimetry were introduced and spatial filtering effect of image light intensity distribution was presented mathematically . The key parameters affecting identity of spatial filter were analyzed by studying power spectrum function of rectangle spatial filter , including the size and shape of the window area as well as number of the slits . The results of study mean a lot to the optimization of parameter design which could highly improve precision of velocity measurement .

关 键 词：空间滤波测速 矩形空间滤波器 功率谱密度函数 空间滤波特性 

分 类 号：V475.3[航空宇航科学与技术—飞行器设计]