线列红外偏振成像系统的设计

Design of Linear Infrared Polarization Imaging System

作为近年来偏振探测技术研究的新热点,焦平面分割型偏振探测器在增强目标与背景对比度和伪装目标识别方面具有明显效果。基于线列短波红外微偏振探测器,设计了一种以Jetson TX1为处理核心的成像系统。该系统主要包括控制模块和处理模块。其中,控制模块由探测器驱动板和FPGA控制板构成,用于实现探测器信号AD转换和图像信号usb传输等;处理模块采用Jetson TX1平台,用于实现图像信号usb接收、积分时间调节、非均匀性校正、偏振度计算以及GPU并行算法。开展了目标场景红外与偏振成像实验,获得了分辨率为500×268的红外图像和红外偏振图像。

As a new hot spot in the field of polarization detection technology in recent years,the focal plane segmented polarization detector has obvious effect both in the enhancement of the contrast between target and background and in the recognition of camouflaged targets.On the basis of a linear near-infrared micro-polarization detector,an imaging system which uses a Jetson TX1 as the core is designed.The imaging system mainly includes a control module and a processing module.The control module which consists of a detector driver board and a FPGA control board is used to implement the AD conversion of detector signals and the usb transmission of image signals.The processing module which uses the Jetson TX1 platform is used to implement the usb reception of image signals,the adjustment of integral time,the correction of non-uniformity,the calculation of polarization degree and the parallel algorithm by GPU.Infrared and polarization imaging experiment is carried out on target scenes and the infrared and infrared polarization images with the resolution of 500×268 pixels are obtained.