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中文摘要：
在光学读出红外成像的理论分析中，通常将具有一定实际尺寸的非相干面光源简化为理想点光源，导致了分析误差。本文建立了面光源模型，通过夫琅禾费衍射理论，研究了面光源影响下的光学检测灵敏度，发现了光学检测灵敏度随光源半径和焦平面阵列反光板长度的变化关系，提出了面光源影响下的光源尺寸和反光板长度的优化设计准则。针对理论分析，进行了实验验证，测试结果与理论分析一致。
英文摘要：
In the theoretical analysis of the optical readout IR imaging, the incoherent area light source with a certain size is typically simplified into an ideal point light source, which leads to analytical errors. In this paper an area light source model is established, and using the Fraunhofer diffraction theory the influence of the optical detection sensitivity on area light source is studied. The dependence of the optical detection sensitivity on light source radius and reflector length of the focal plane array is found. And optimized design criteria for the size of light source and the length of the reflector are proposed. According to theoretical analysis, the experimental verification is carried out, and the results are consistent with theoretical analyses.
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