介绍了基于非制冷测辐射热计阵列红外成像系统的噪声等效温差(NETD)计算模型。由此设计了一种非制冷微测辐射热计阵列单元结构模型，并对此模型进行了有限元分析，继而对该模型进行了优化。

In this paper we presented a model for the noise equivalent temperature difference (NETD) of infrared imaging systems based on uncooled microbolometer arrays. According to calculational model we designed the pixel structure of uncooled microbolometer arrays. Then, several results of the analysis of the stress and displacement are presented using FEA (Finite Element Analysis) in this paper. According to this result we have got an optimal design of the pixel structure.