基于锑化铟中波制冷红外探测器的高帧频图像采集系统设计  

Design of High Frame Rate Image Acquisition System Based on Medium Wave Infrared InSb Detector

作　　者：胡鹏博[1] 郭晓东[1] 詹东军 潘亮 HU Peng-bo;GUO Xiao-dong;ZHAN Dong-jun;PAN Liang(Huazhong Institute of Electro-Optics—Wuhan National Laboratory for Optoelectronics,Wuhan 430223,China)

机构地区：[1]华中光电技术研究所—武汉光电国家研究中心,湖北武汉430223

出　　处：《光学与光电技术》2022年第6期53-57,共5页Optics & Optoelectronic Technology

摘　　要：高帧频中波制冷红外探测器在机载光电吊舱、红外警戒系统、光电跟踪瞄准系统中有着广泛应用。传统的碲镉汞中波制冷红外探测器在保证成像质量前提下,受积分时间限制,帧频一般受限于25~100 Hz。而锑化铟中波红外探测器具备较好的非均匀性、较低的盲元率以及高帧频输出特性,可进一步提高红外系统作用距离和跟踪精度。基于中波红外锑化铟探测器设计了高速稳定的图像采集系统,实现了640×512分辨率数字视频200 Hz的图像输出。高帧频模式下,解决了探测器积分时间与读出时间信号串扰的问题,有效改善了红外图像的非均匀性。该系统通过探测器开窗设置,将帧频进一步提高,可实现对高速目标的红外探测、搜索、识别、侦察、情报搜集、跟踪等。High frame frequency medium wave refrigerated infrared detectors are widely used in airborne photoelectric pods,infrared warning systems and photoelectric tracking and aiming systems.The traditional medium wave cooling infrared detector of HgCdTe is limited by the integration time,and the frame frequency is generally limited by 25~100 Hz under the premise of ensuring the imaging quality.Moreover,InSb medium wave refrigerated infrared detector has good non-uniformity,low blind element rate and high frame frequency output characteristics,which can further improve the infrared system range and tracking accuracy.In this paper,a high-speed and stable image acquisition system is designed based on InSb medium wave refrigeration infrared detector,and the image output of 640×512 resolution digital video at 200Hz is achieved.In the high frame frequency mode,the cross-talk between the detector integration time and the readout time signal is solved,and the non-uniformity of infrared image is effectively reduced.The system can further improve the frame frequency through the window setting of the detector,which can realize the infrared detection,search,identification,reconnaissance,intelligence collection,tracking and so on.

关 键 词：锑化铟 碲镉汞 红外探测器 高帧频 现场可编程门阵列 

分 类 号：TN215[电子电信—物理电子学] TP391.41[自动化与计算机技术—计算机应用技术]