一种改进的相机灵敏度测试系统

发布时间：2018-05-28 08:44

本文选题：探测灵敏度 + 高斯拟合　；参考：《中国测试》2017年06期

【摘要】：空间激光通信系统以激光为载体进行数据传输,由于大气信道干扰、剧烈平台扰动、强烈大气附面层等不利影响,使得捕获探测器接收到的光斑信号非常微弱,影响通信链路的建立,对捕获探测器的灵敏度测量有助于分析和评价捕获链路建立的最远距离。在充分分析捕获链路功率的基础上搭建实验系统,用扫描振镜及CCD相机完成对其灵敏度测试实验。实验表明:当曝光时间为2 ms和0.2 ms时,相机的探测能力分别为-80.83 d Bm和-72.43 d Bm。在极限探测灵敏度下,选用高斯拟合算法进行激光光斑中心的定位计算,结果表明该算法定位精度可达0.01pixel,并且具有良好的稳定性。
[Abstract]:In space laser communication system, laser is used as the carrier for data transmission. Because of the adverse effects of atmospheric channel interference, severe platform disturbance and strong atmospheric boundary layer, the spot signal received by the capture detector is very weak. The sensitivity measurement of the capture detector is helpful to analyze and evaluate the longest distance of the acquisition link. Based on the analysis of the captured link power, the experiment system is built, and the sensitivity testing experiment is completed by scanning vibroscope and CCD camera. The experimental results show that when the exposure time is 2 Ms and 0.2 Ms, the detection ability of the camera is -80.83 dBm and -72.43 dBm, respectively. Under the limit detection sensitivity, the Gao Si fitting algorithm is used to locate the laser spot center. The results show that the accuracy of the algorithm can reach 0.01 pixel, and the algorithm has good stability.
【作者单位】：长春理工大学空地激光通信技术国防重点学科实验室;
【基金】：国家高新技术研究发展计划“863计划”资助项目(2014AA701178)
【分类号】：TN791;TN929.1;TP391.41

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