宽波段非制冷IRFPA的中波和长波红外比色成像测温  

Mid-Wave and Long-Wave Infrared Colorimetric Imaging Thermometry Based on Wideband Uncooled IRFPA

作　　者：刘志豪 杨建国 金伟其 李力 Liu Zhihao;Yang Jianguo;Jin Weiqi;Li Li(Key Laboratory of Photoelectronic Imaging Technology and Systems,Ministry of Education,School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学光电学院光电成像技术与系统教育部重点实验室,北京100081

出　　处：《光学学报》2025年第1期68-78,共11页Acta Optica Sinica

基　　金：国家自然科学基金(61871034)。

摘　　要：针对常温景物的遥感测温要求,为提升辐射测温精度,研究了基于宽波段非制冷红外焦平面阵列(IRFPA)的中波红外(MWIR)和长波红外(LWIR)比色成像测温方法,分析了常见材料在MWIR和LWIR的光谱发射率,说明在常温条件下MWIR和LWIR波段灰体假设的适用性;然后给出宽波段非制冷IRFPA用于MWIR和LWIR比色成像测温的修正模型;最后通过典型目标的测温实验,证明双波段比色成像测温比单波段辐射成像测温具有更高的测温精度和稳定性,相对误差较单波段辐射成像测温平均低3~4百分点。Objective Radiation thermometry is a widely utilized method offering several advantages,such as noncontact measurement,rapid response,large dynamic range,and passive operation.It is extensively applied across various fields,including industry and biomedicine.To meet the high-temperature measurement requirements of sectors like glass manufacturing,metallurgy,rocket engines,and gas turbines,visible and near-infrared spectral bands are typically employed to mitigate emissivity deviations.These bands are suitable for measuring temperatures ranging from several hundred to a few thousand degrees Celsius.To accurately determine the target temperature and emissivity,a narrow spectral band is required.Building upon the gray body assumption,dual-band colorimetric thermometry reduces the influence of emissivity and environmental factors.Both single-band thermometry and colorimetric thermometry typically use narrowband imaging,and narrower bands improve thermometry precision without compromising detector sensitivity.However,limitations in infrared detector sensitivity present challenges for narrowband or multiband thermometry.Traditionally,dual-band infrared colorimetric thermometry has relied on cooled IRFPAs.Recent advancements in uncooled infrared detector materials and manufacturing processes have brought uncooled MWIR and LWIR IRFPAs to a practical level of functionality.Moreover,colorimetric thermometry based on uncooled IRFPAs shows promising prospects in terms of size,longevity,and reliability.This research investigates MWIR and LWIR colorimetric thermometry using a wideband uncooled IRFPA,focusing on the applicability of the gray body assumption and addressing detector response drift to enhance the accuracy of radiation thermometry for room-temperature targets.Methods This study focuses on applying wideband MWIR and LWIR colorimetric imaging thermometry and introduces improvements to existing methods.First,through theoretical derivation and applying the gray body assumption to segmented MWIR and LWIR bands,it is dem

关 键 词：非制冷红外焦平面阵列 辐射测温 比色测温 灰体假设 中波和长波红外 

分 类 号：TN219[电子电信—物理电子学]