| MRTD高精度测试和校准技术研究 |
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| 引用本文： | 王学新,杨鸿儒,吴李鹏,闫晓宇,郭羽,李四维.MRTD高精度测试和校准技术研究[J].应用光学,2020,41(5):1026-1031. |
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| 作者姓名： | 王学新 杨鸿儒 吴李鹏 闫晓宇 郭羽 李四维 |
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| 作者单位： | 西安应用光学研究所，陕西 西安 710065 |
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| 基金项目： | 国防科工局技术基础项目 |
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| 摘 要： | 围绕红外热像仪成像参数MRTD（最小可分辨温差）测试问题开展研究，介绍了MRTD的测试方法以及MRTD测试装置—红外热像仪评估系统的工作原理，详细分析了MRTD测试过程中，红外热像仪测试位置、差分黑体温差、差分黑体发射率和光学系统几何像差等因素对测试结果的影响。针对这些问题，提出了采用红外扫描辐射计对红外热像仪评估系统温差进行校准的方法，利用该方法对某空间频率下热像仪MRTD进行测试，并给出了测试结果，为热像仪MRTD参数准确测试提供参考。
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| 关 键 词： | 最小可分辨温差 热像仪评估系统 MRTD测试 校准 |
| 收稿时间： | 2020-03-27 |
Research on high precision MRTD testing and calibration technology |
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| Affiliation: | Xi’an Institute of Applied Optics, Xi’an 710065, China |
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| Abstract: | The testing of the imaging parameter minimum resolvable temperature difference (MRTD) for infrared thermal imager was studied. Firstly, the testing method and device of the MRTD as well as the working principle of the evaluation system for infrared thermal imager were introduced. Then, in the process of MRTD testing, the influence of the testing position, differential blackbody temperature difference, differential blackbody emissivity and optical system geometrical aberration of infrared thermal imager on the testing results was analyzed in detail. Aiming at these problems, a method of calibrating the temperature difference of the infrared thermal imager evaluation system by using the infrared scanning radiometer was proposed. This method was used to test the MRTD of the infrared thermal imager at a certain spatial frequency, and the testing results were given to provide a reference for the MRTD parameters accurate testing of the infrared thermal imager. |
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