首页 | 本学科首页   官方微博 | 高级检索  
     

制冷型热红外焦平面成像系统数据处理的关键技术
引用本文:王湘波,陈小文,李春来,姬弘桢,王建宇.制冷型热红外焦平面成像系统数据处理的关键技术[J].红外,2014,35(5):7-12.
作者姓名:王湘波  陈小文  李春来  姬弘桢  王建宇
作者单位:中国科学院上海技术物理研究所,中国科学院上海技术物理研究所,中国科学院上海技术物理研究所,中国科学院上海技术物理研究所,中国科学院上海技术物理研究所
基金项目:国家高技术发展计划(863计划)课题(2012AA121102)
摘    要:长波红外(8~12.5μm)焦平面的性能在很多方面弱于中短波红外器件,其非均匀性及盲元状况较严重。本课题首次在国内引进了法国Sofradir公司的320×256像元HgCdTe长波红外焦平面探测器MARS VLW RM4,其波长响应范围为7.7~12μm。基于一套高帧频低噪声信息获取系统,经过动态范围标定,实现了一套动态范围为250~330K、噪声等效温差(Noise Equivalent Temperature Difference.NETD)小于50mK的热红外成像系统。针对焦平面各像元的响应特性,研究了适用于热红外成像系统的非均匀性及盲元校正方法,提出了基于辐射定标的非均匀性校正和盲元检测。经实验验证,其校正效果优于两点定标法,且易于工程实现,基于辐射定标的结果可实现精确的温度反演。

关 键 词:热红外焦平面  热红外成像系统  辐射定标  盲元检测  非均匀性校正
收稿时间:2014/3/27
修稿时间:2014/4/10 0:00:00

Key Techniques of Data Processing for Cooled Thermal Infrared Focal Plane Array Imaging System
Wang Xiang-bo,CHEN Xiao-wen,LI Chun-lai,JI Hong-zhen and WANG Jian-yu.Key Techniques of Data Processing for Cooled Thermal Infrared Focal Plane Array Imaging System[J].Infrared,2014,35(5):7-12.
Authors:Wang Xiang-bo  CHEN Xiao-wen  LI Chun-lai  JI Hong-zhen and WANG Jian-yu
Affiliation:Shanghai Institute of Technical Physics, Chinese Academy of Sciences,Shanghai Institute of Technical Physics,Shanghai Institute of Technical Physics,Shanghai Institute of Technical Physics and Shanghai Institute of Technical Physics
Abstract:A long wave infrared (8-12.5 μm) focal plane array can not operate better than medium and short wave ones in many respects. Its non-uniformity and blind-pixel problems are quite serious. A MARS VLW RM4 320-256 HgCdTe long wave infrared focal plane array detector with a wavelength response range from 7.7 μm to 12 μm is imported from Sofradir Company in France. On the basis of a high frame frequency and low-noise information acquisition system of which the dynamic range is calibrated, a thermal infrared imaging system is developed. Its dynamic range is from 250 K to 330 K and Noise Equivalent Temperature Difference (NETD) is less than 50 mK. According to the response characteristics of the pixels in the array detector, the non-uniformity and blind-pixel correction method suitable for thermal infrared imaging systems are studied. A non-uniformity and blind-pixel detection method based on radiation calibration is put forward. The experimental result shows that the method is better than the two-point method. It is easy to be implemented in engineering. The result based on radiation calibration is useful for more precise temperature inversion.
Keywords:thermal infrared focal plane  thermal infrared imaging system  radiation calibration  blind pixel detection  non-uniformity correction
本文献已被 CNKI 维普 等数据库收录!
点击此处可从《红外》浏览原始摘要信息
点击此处可从《红外》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号