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作 者:黄思佳 袁银麟[2] 翟文超[2] 郑小兵[2] 雷正刚[3] 林宇[3] Huang Sijia;Yuan Yinlin;Zhai Wenchao;Zheng Xiaobing;Lei Zhenggang;Lin Yu(School of Environment Science and Optoelectronic,University of Science and Technology of China,Hefei 230026,China;Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;Kunming Institute of Physics,Kunming 650223,China)
机构地区:[1]中国科学技术大学环境科学与光电技术学院,安徽合肥230026 [2]中国科学院合肥物质研究院安徽光学精密机械研究所,安徽合肥230031 [3]昆明物理研究所,云南昆明650223
出 处:《红外与激光工程》2022年第12期73-82,共10页Infrared and Laser Engineering
基 金:国家重点研发计划(2018YFB0504602);国家自然科学基金(41805019)。
摘 要:噪声等效光谱辐亮度(NESR)是代表红外遥感器极限探测能力的关键性指标。高灵敏红外遥感器的NESR定标需要高稳定、高均匀和充满视场的红外辐射光源,其光谱辐亮度的不确定度应当显著低于红外遥感器的NESR。针对一种新型的级联积分球型大孔径NESR定标系统,开展了NESR定标不确定度的实验测试研究,评定了绝对光谱辐亮度的量值溯源、积分球输出的均匀性和稳定性等11种不确定性因素的影响。测试结果表明,在规定的303~308K亮温范围内,主积分球光谱辐亮度的相对不确定度优于0.34%,6~15μm波段的NESR定标不确定度优于0.1~0.0037μW·cm^(-2)·sr^(-1)·μm^(-1),验证了新型定标系统应用于高性能红外遥感器NESR定标的可行性。Noise equivalent spectral radiance(NESR)is a significant index representing the ultimate detection capability of infrared remote sensors.NESR calibration of highly sensitive infrared remote sensor requires an infrared radiation source with high stability,high uniformity and full field of view,and the uncertainty of its spectral radiance should be significantly lower than that of NESR of infrared remote sensor.Aiming at a new large aperture cascade integrating sphere NESR calibration system,this paper carried out experimental testing and research on the calibration uncertainty of NESR,and evaluated the influence of 11 uncertainty factors,such as the magnitude traceability of absolute spectral radiance,the uniformity and stability of integrating sphere output.The test results show that the relative uncertainty of the spectral radiance of the primary integrating sphere is better than 0.34%within the specified brightness temperature range of 303-308K;the NESR calibration uncertainty is better than 0.1~0.0037μW·cm^(-2)·sr^(-1)·μm^(-1)within the wavelength range of 6-15μm,which verifies the feasibility of applying the new calibration system to the NESR calibration of high-performance infrared remote sensor.
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