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红外焦平面探测器的响应非均匀性将产生空域噪声,影响系统的灵敏度,在一般的红外系统灵敏度噪声等效照度(NEFD)和噪声等效温差(NETD)计算公式中,却不包含非均匀性的影响。通过非均匀性空域噪声的定义和焦平面探测器的空域噪声与时域噪声不相关的基本假设,在给出图像总噪声与探测器空域噪声和时域噪声关系的基础上,推导出了响应非均匀性与系统灵敏度NEFD和NETD的关系式,为红外系统的设计特别是非均匀性校正提供了依据。
The response inhomogeneity of the infrared focal plane detector will produce spatial noise and affect the sensitivity of the system. In general, the NEFD and NETD calculation formulas do not include non-uniform Sexual effects. Based on the definition of nonuniform spatial noise and the basic assumption that spatial plane noise of focal plane detector is not correlated with time domain noise, based on the relationship between the total image noise and the space noise of the detector and the time domain noise, the response is deduced Non-uniformity and system sensitivity The relationship between NEFD and NETD provides a basis for the design of infrared systems, especially for non-uniformity correction.