超光谱成像探测系统的图谱标定和评估  

Calibration of the Detection Performance for Hyperspectral Imager

作　　者：许强[1] 金伟其[1] 傅连秋[2] 

机构地区：[1]北京理工大学光电工程系 [2]中国人民银行印制科学技术研究所,北京100070

出　　处：《光谱学与光谱分析》2007年第9期1676-1679,共4页Spectroscopy and Spectral Analysis

基　　金：国家电子技术支撑项目(E0202051)资助

摘　　要：超光谱成像是一种场景图谱合一的技术,在战场侦察中得到了迅速应用。超光谱成像系统的标定是确定其输出准确数值的过程。分析了一种基于背照减薄CCD和凹面光栅成像光谱部件的UV/Vis/NIR超光谱军用探测系统,其光谱分辨力为3.3 nm;探讨了0.25-1.1μm工作波段内超光谱成像系统的标定和评估方法,详细介绍了以带有测试靶均匀辐射源为对象的空间成像质量评估、以激光和Hg灯为基础的光谱质量评估以及利用高精度标准辐射源的辐射性能标定。在经过多步辐射校正和光谱真实性检测验证后,最终获得的景物反射率光谱曲线真实反映了光谱特性,满足了0.2 mrad的空间分辨力和±0.5%色散线性率的精度要求并在军用探测系统中进行了反伪装的成功应用。As an image-spectrum merging technology,hyperspectral imaging has been used in battlefield reconnaissance rapidly.The calibration of hyperspectral imager is a process that corrects itself＇s output.An UV/Vis/NIR hyperspectral military detection system based on BTCCD and concave grating parts is analyzed,and it＇s spectral resolution is 3.3 nm.Some calibration and evaluation methods are discussed for hyperspectral imaging system which operates at 0.25-1.1 mm waveband.Image quality assessment based on an uniform radiation source with target,spectral quality assessment based on laser and Hg lamp,and radiation performance calibration based on high accuracy standard are researched detailedly.After several steps of radiation calibration and spectral fidelity verification,the reflective curve which represents the objective spectral character was obtained,satisfying the requirement of 0.2 mrad spatial resolution and ±0.5% dispersive linearity.Finally,satisfactory results were obtained with these methods in a military detection system.

关 键 词：超光谱成像 探测系统 图谱标定 

分 类 号：TN223[电子电信—物理电子学]