偏振-微光一体化EMCCD相机的设计与开发  

Design and development of polarization-low level light integrated EMCCD camera

作　　者：那启跃 姜恺文 徐建东 沈吉 常维静 NA Qiyue;JIANG Kaiwen;XU Jiandong;SHEN Ji;CHANG Weijing(East China Institute of Optoelectronic Integrated Device,Suzhou 215163,China)

机构地区：[1]华东光电集成器件研究所,江苏苏州215163

出　　处：《应用光学》2024年第2期321-328,共8页Journal of Applied Optics

基　　金：十四五装备预先研究联合基金(627010408)。

摘　　要：多维度的信息获取是微光夜视探测技术未来的发展方向,偏振成像是光电探测领域中的一种维度,偏振相机的研制是研究偏振成像技术的前提。基于集成偏振阵列结构的电子倍增CCD(electron multiplying CCD, EMCCD)器件,集合EMCCD微光探测的优势和偏振维度的探测功能,论述了偏振-微光一体化相机的硬件电路设计和开发方案,完成偏振维度信息与光强度信息一机同步采集作业,并通过FPGA对原始数据进行偏振运算与图像传输处理。搭建测试系统,对设计与开发的偏振样机进行性能测试。实验结果表明,在温度273 K、读出频率2 MHz条件下,器件的读出噪声为8.81e-,动态范围约为74 dB,样机的消光比可达50.95,透过率可达60.16%,并可实时地选择性输出偏振度图像、偏振角图像、光强度与偏振融合图像,极大地提高了夜间环境下对目标的识别探测能力。Multi-dimensional information acquisition is the future development direction of the low-level-light(LLL)night vision detection technology.Polarization imaging is a dimension in the field of photoelectric detection,and the development of polarization camera is the premise of studying polarization imaging technology.The electron multiplying CCD(EMCCD)device integrates polarization array structure,which has the advantage of LLL detection and the function of polarization dimension detection.Based on this device,the hardware circuit design and development scheme of polarization LLL integrated camera were discussed.The camera could complete the synchronous acquisition of polarization dimension information and light intensity information,and the original data was processed by polarization operation through FPGA.Then,the processed image data was transmitted to the PC.A test system was built to analyze the performance of the developed polarization camera.The experimental results show that,at 273 K temperature and 2 MHz readout frequency,the readout noise of the device is 8.81e-,the dynamic range is about 74 dB,the extinction ratio of the camera can reach 50.95,and the transmissivity can reach 60.16%.The camera can selectively output the degree of polarization image,the angle of polarization image,the image of light intensity and polarization fusion in real time,which greatly improves the recognition and detection ability of targets in the night environment.

关 键 词：EMCCD 偏振成像 微光 一体化 识别探测 

分 类 号：TN223[电子电信—物理电子学]