非制冷微测辐射热计焦平面阵列技术在国外已取得了令人瞩目的成就 ,与其它红外探测器相比 ,微测辐射热计更适于开拓民用市场 ,目前国内在这方面的研究也已成为热点。文章介绍了微测辐射热计的物理模型及其理论计算方法 ,利用黑体辐射和传热理论 ,建立了微测辐射热计的热平衡方程 ,并利用MATLAB软件获得了数值运算结果。分析表明 ,热传导、热容、偏置方式等对微测辐射热计性能的影响是设计考虑的关键。 Uncooled microbolometer focal plane array technology has made remarkable achievements in foreign countries, compared with other infrared detectors, the microbolometer is more suitable for developing the civilian market, the current domestic research in this area Has become a hot spot. In this paper, the physical model of microbolometer and its theoretical calculation method are introduced. The heat balance equation of the microbolometer is established by using blackbody radiation and heat transfer theory. The numerical calculation results are obtained by MATLAB software. The analysis shows that the influence of heat conduction, heat capacity and bias method on the performance of the microbolometer is the key to design consideration.