Research on the response model of microbolometer

• Published in: Chinese physics B 2010-10, Vol.19 (10), p.642-651, Article 108702
• Main Author: Sui Xiu-Bao Chen Qian Gu Guo-Hua Liu Ning
• Format: Article
• Language: English
• Subjects: 动态范围; 反应模型; 响应模型; 实验数据; 应用程序; 热平衡方程; 目标温度; 非制冷焦平面阵列
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/19/10/108702

There are certain limitations in the application of uncooled focal plane array （FPA） detector due to the lack of an effective response model which reliably transforms the target temperature to analog output voltage. This paper establishes the response model of microbolometer through researching the detection theory of microbolometer and the heat balance equation under the condition of the pulsed voltage bias. In the establishing process, we simplified the heat balance equation to acquire a simple answer. The experimental data show that, in the temperature dynamic range of 30 K, the biggest tolerance between the model data and the experiment data is 0.2 K; while in the temperature dynamic range of 100 K, it is 1 K. This model can reflect the real response of the microbolometer with only small differences which are acceptable in engineering applications.