红外热像仪参数的双黑体测量装置  

Double-blackbody unit for measuring parameters of infrared cameras

作　　者：胡铁力[1] 李旭东[1] 傅建明[1] 薛战理[1] 岳文龙[1] 

机构地区：[1]西安应用光学研究所国防科工委光学计量一级站,西安710065

出　　处：《应用光学》2006年第3期246-249,共4页Journal of Applied Optics

摘　　要：对红外热像仪参数双黑体测量装置的工作原理进行了介绍。装置采用双黑体及反射型靶标为温差辐射源,可实现黑体温度温差准直辐射的定期校准和红外热像仪参数测量量值的溯源,也可实现红外热像仪参数的可控性,以及对它进行稳定的、可复现的精确测量。推导出利用红外热像仪参数双黑体测量装置测量信号传递函数S iTF数学模型,分析了红外热像仪参数测量装置的客观因素——仪器常数,针对仪器常数对S iTF测量的影响进行了试验。试验结果表明,仪器常数对红外热像仪S iTF参数测量精度影响较大,并同时影响时域与空域NETD及3D噪声的准确测量。The working principle of a double-blackbody measurement unit for parameters of infrared cameras is introduced. The unit employs double-blackbody and a set of reflective infrared targets as thermo-emitting sources, which makes it easy to control the temperature and temperature difference, therefore measurement reproducibility is guaranteed. The apparatus can be used for the periodic calibration of collimated irradiation of temperature difference, and to measure the parameters of infrared cameras in controllable and steadily way. A mathematic model for testing and evaluating signal transform function （SiTF） of infrared cameras was established, all the factors affecting the apparatus constant were listed in this model. Experiments were conducted to observe the effect of apparatus constants on SiTF measurement. The experiments show that the apparatus constants greatly affect SiTF measurement, temporal NETD measurement, spatial NETD measurement and 3D noise.

关 键 词：红外热像仪 参数测量 红外靶标 信号传递函数 仪器常数 

分 类 号：TN216[电子电信—物理电子学]