共查询到19条相似文献,搜索用时 78 毫秒
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本文介绍了非制冷红外热像仪产品批产过程的控制及关键技术,并提出了几条加强过程质量控制的有效措施. 相似文献
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热像仪非均匀性校正是热像仪应用的一个关键技术,常用的方法为基于黑体的热像仪非均匀性校正方法。多次成像法能解决基于黑体的方法受辐射源非均匀影响的问题,但该方法利用多幅热图的相对关系进行校正,在热图坐标下准确定位较为困难。本文基于多次成像法原理,提出了一种基于匀速扫描黑体的非均匀性校正方法,该方法结合了标定类和配准类基于场景的校正方法的优点,通过热像仪扫描读取黑体参考源,利用热像仪不同探测单元对黑体同一场景点响应的差异进行非均匀性评价。相比多次成像法,本文的方法更容易实现且具有更好的抗噪声能力。利用本文的方法对两个热像仪进行非均匀性校正,结果表明确实可以分离黑体非均匀性,但提高了对黑体辐射源和热像仪时间稳定性的要求。 相似文献
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针对卫星发射前在轨数据缺乏导致的无法进行成像质量评估、链路分析及几何处理算法验证等问题,提出了一种基于光线追迹的长线列摆扫式热像仪在轨几何成像仿真方法.首先根据光学系统结构及成像特点,构建了长线列摆扫式热像仪严格几何定位模型;然后,基于姿轨仿真数据、DOM和DEM辅助数据,通过光线追迹及重投影算法实现了像元视矢量的空间... 相似文献
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《Microelectronics Reliability》2014,54(9-10):1758-1763
This paper presents an innovative and effective method of measuring the internal vacuum quality of un-cooled micro bolometer thermal imager sensors where the bolometer sensor elements themselves are used for vacuum measurement. A feasible thermal calculation model using an extended Fourier’s Law is presented which is integrated in thermal FEM simulations. Experimental results correlating with FEM simulations prove the feasibility of this method. A measuring range to pressures as low as 5 × 10−3 mbar was achieved that fully covers the needed range where the internal package pressure is leading to performance losses of the IRFPA. The vacuum quality evaluation method supported by a developed temperature compensation method is showing a high repetitive accuracy with a remaining mean failure of 0.2%. Without the need to integrate additional pressure sensors this method reduces costs and chip area and it is fast and highly accurate. Therefore, it can be used for stationary test systems as well as in mobile infrared camera systems. 相似文献