机载光电瞄准系统红外灵敏度测试技术

Infrared Sensitivity Testing Technology of Airborne Electro-Optical Targeting System

红外灵敏度测试技术用于量化检测机载光电瞄准系统的目标作用距离。为在内场条件下有效测试和评估多光谱光电探测系统对中远距离红外目标的搜索跟踪能力,设计一套用于模拟红外目标热源及定量输出红外辐照度的光学测量系统。按照黑体经典发射理论设计计算黑体腔体结构及加热功率,光学结构采用卡赛格林式反射系统准直汇聚红外光路,测算并建立目标与背景红外辐射特性和光阑孔径的参数对应关系,实现对光电系统目标作用距离、探测灵敏度、跟踪灵敏度等战技性能的定量测试及评价。测试结果表明,该光学测量系统能够有效模拟5~100 km距离的红外目标热源,精确标定6组模拟作用距离对应的光阑直径,并能稳定输出在光电系统响应波段的红外辐射照度,可实现对机载光电瞄准系统的红外灵敏度测试。

Infrared sensitivity testing technology is used to quantitatively detect the operating distance of airborne electro-optical targeting system.In order to test and evaluate the ability of the multispectral electro-optical detecting system for searching and tracking infrared targets in middle/long distance under infield condition an optical measurement system is designed for simulating infrared target heat source and outputting infrared irradiance quantitatively.The blackbody cavity structure and heating power are calculated according to the blackbody classic emission theory.Cassegrain-type reflection system is used to collimate and converge the optical structure to the infrared light path.The parameter relationship between the target infrared radiation characteristics and the diaphragm apertures is established thus to test and evaluate such performance parameters as operating distance detection sensitivity and tracking sensitivity of the electro-optical system quantitatively.The test results show that the optical measurement system can effectively simulate the infrared target at a distance of 5~100 km accurately calibrate the aperture diameters corresponding to 6 sets of simulated operating distances and stably output the infrared irradiance in the response band of the electro-optical system.The infrared sensitivity test of airborne electro-optical targeting system is realized.