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红外热像仪成像评估系统设计
投稿时间:2019-04-25  修订日期:2020-03-29  点此下载全文
引用本文:张志强,王萍,于旭东,周玉梅,李婷.红外热像仪成像评估系统设计[J].红外,2020,41(6):17~24
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作者单位E-mail
张志强 天津大学 电气自动化与信息工程学院 天津 zqz411@163.com 
王萍 天津大学 电气自动化与信息工程学院 天津  
于旭东 中科和光天津应用激光技术研究所有限公司 天津  
周玉梅 中科和光天津应用激光技术研究所有限公司 天津  
李婷 中科和光天津应用激光技术研究所有限公司 天津  
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:红外热像仪在军民应用领域发展迅速。如何客观地评价红外热像仪成像效果,为红外热像仪成像性能提供定量的数学描述,同时也为研究红外成像系统的图像清晰度、目标探测距离和目标跟踪性能提供支撑依据,成为必须要解决的问题。本文提出的红外热像仪成像评估(质量评价)系统具有红外图像数据采集与处理功能,配合红外成像评估的靶标系统(由黑体、辐射靶标控制台、准直光学系统、数显精密转台组成)进行红外图像数据测试评估。设计了图像评估的主要性能指标,并提出了数学模型及其实现的步骤,其中包括图像不均匀性(Non-uniformity,NU)、信号传递函数(Signal Transfer Function, SiTF)、噪声等效温差(Noise Equivalent Temperature Difference, NETD)、角线性度(Angular Linearity, AL)、目标成像定位角误差(Target Imaging Positioning Angle Error, TIPAE)等主要评价技术指标。测试结果表明,该系统的性能非常优越,成为红外热像仪研制过程中必备的调试、测试设备。
中文关键词:红外热像仪  图像不均匀性  信号传递函数  噪声等效温差
 
Design of Imaging Evaluation System for Infrared Thermal Imager
Abstract:Infrared thermal imager has developed rapidly in the field of military and civilian applications. How to objectively evaluate the imaging effect of the infrared thermal imager has become a problem that must be solved. Which no only provides quantitative mathematical description for the imaging performance of the infrared thermal imager, but also provides the supporting basis for the study of the image sharpness, target detection distance and target tracking performance of the infrared imaging system. The imaging evaluation system of thermal infrared imager proposed in this paper has the functions of infrared image data acquisition and processing. It is used to test and evaluate infrared image data in coordination with the target system of infrared imaging evaluation (composed of blackbody, radiation target console, collimating optical system and digital display precision turntable). The system has designed the main performance indexes, mathematical model and steps of image evaluation, including image Non-uniformity(NU), Signal Transfer Function(SiTF), Noise Equivalent Temperature Difference (NETD), Angular Linearity(AL), Target Imaging Positioning Angle Error(TIPAE) and other main evaluation technical indexes. After system testing, the performance is very superior and it becomes the necessary debugging and testing equipment in the development of infrared thermal imager.
keywords:thermal infrared imager  image nonuniformity  SiTF  NETD
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