外部因素对光电跟踪仪低对比度目标捕获能力的影响分析  

External Factors Analysis for Influence of Low-Contrast Target Capture Capability on Photoelectric Tracker

作　　者：黄欣[1,2] 沈湘衡[1] 叶露[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 [2]中国科学院大学,北京100049

出　　处：《光学学报》2014年第7期210-217,共8页Acta Optica Sinica

基　　金：国家863计划(2012AA040503);国家自然科学基金重点基金(11034007)

摘　　要：在分析存在外部因素影响光电设备跟踪能力检测的基础上,提出了利用建模分析的方法,在外部因素(目标速度、目标大小、目标亮暗和物方目标对比度)和图像目标对比度之间建立起数学模型。实验采用可调对比度无穷远目标源装置、高速摄像机、精密转台和捕获仿真装置等建立检验环境,通过数学模型分析和图像分析相互验证,着重对不同的外部因素进行了特性分析。实验结果证明:在背景辐亮度为3.2W/(sr·m2)的工况条件下,拟合的方程能够准确地表述各外部因素与图像对比度的数学关系,通过设定各外部因素水平能够对光电跟踪设备的捕获能力进行有效检测。The method to detect the capture capability of photoelectric tracker affected by the external factors is analyzed. The mathematical equations that involve the relations between image contrast and the external factors which include target size, target velocity, target contrast in object space, light （dark） target are put forward. The detection environment consists of the adjustable contrast optical target device, high-speed camera, capture simulator and turntable. Characteristic analysis of the different external factors on capture caphbility gets fine mutual verification by the model analysis and image analysis. The experimental results show that the fitting equations is suitable for the accurate calculation between image contrast and the external factors in the background of which the spectral radiance is 3.2 W/（sr· m2）. The study on the external factors and image contrast is meaningful for the evaluation of the capture capability on photoelectric tracker.

关 键 词：光学器件 光电跟踪仪 低对比度目标捕获能力 外部因素 图像对比度 

分 类 号：TH761.1[机械工程—仪器科学与技术]