红外焦平面探测器响应率不稳定像元快速筛选方法

发布时间：2018-02-28 16:09

本文关键词： 红外焦平面探测器响应率不稳定相对响应率黑体标定　出处：《红外技术》2017年02期 　论文类型：期刊论文

【摘要】：随着红外探测技术的发展,制冷型红外焦平面探测器在航空航天和民用领域的应用越来越广泛。探测器像元响应率的不稳定性对红外焦平面探测器定量化应用产生非常大的影响。目前检测响应率不稳定像元的方法主要通过定量化的黑体标定的方法来实现,该类方法需要改变黑体温度从而得到像元的响应率,操作步骤和计算过程比较复杂,不易于高频次的工程测试实现。本文提出了一种通过计算像元随积分时间的相对响应率变化来快速筛选不稳定像元的方法,该方法每次测试时仅需要对着一个固定温度的黑体,改变积分时间获取一组探测器成像数据,通过计算每个像元的相对响应率,然后对比像元在不同测试时得到的相对响应率变化,通过与设定阈值的比较就可以实现响应不稳定性像元的筛选,自定义阈值还可以实现对响应不稳定像元进行分级。实验证明,该方法能够有效筛选出响应率不稳定的像元,操作简便,便于工程实现。
[Abstract]:With the development of infrared detection technology, Refrigerated infrared focal plane detectors (IRFPs) have been widely used in aerospace and civil fields. The instability of detector pixel responsivity has a great influence on the quantitative application of IRFPs. At present, the detection of infrared focal plane detectors (IRFPs) is very important. The method of response rate instability pixel is mainly realized by the method of quantifying blackbody calibration. This kind of method needs to change the blackbody temperature to get the response rate of the pixel. This paper presents a method to quickly screen unstable pixels by calculating the relative response rate of pixels with integral time. The method only needs a blackbody with a fixed temperature in each test. A set of detector imaging data is obtained by changing the integral time, and the relative responsivity of each pixel is calculated, and then the relative response rate of each pixel is compared with the variation of the relative response rate obtained by the pixel in different tests. By comparing with the threshold setting, the response instability pixel can be filtered, and the response unstable pixel can be classified by the custom threshold. The experimental results show that the proposed method can effectively screen the pixel with unstable response rate. It is easy to operate and easy to realize.
【作者单位】：中国科学院大学;中国科学院上海技术物理研究所;
【基金】：中国科学院上海技术物理研究所创新基金(CX-60)
【分类号】：TN215

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