摘要
为了提高传统分时旋型红外偏振成像的速度,设计了适用于中波红外热像仪的检偏器组件,将红外热像仪改装成中波红外偏振成像装置,用于获取目标场景的红外偏振信息。该装置通过电机以900 r/min速度匀速驱动红外偏振片旋转,采集不同偏振方向的红外强度图像。利用单像元非均匀性差分图像校正方法对红外图像中的冷反射进行扣除,利用迭代排序方式对校正后的红外强度图像进行处理,结合构建的斯托克斯矢量模型,计算连续相邻的三幅红外强度图像的红外偏振度和偏振角,保证与红外强度图像有相同的成像帧频。实验结果表明,该装置能够稳定输出待测目标的红外偏振度和偏振角图像,输出红外偏振图像的帧频为45 frame/s,满足对变化场景实时红外偏振探测的需求。
In this study,an analyzer assembly suitable for developing a midwave infrared thermal imaging camera is designed to improve the speed of traditional time-sharing infrared polarization imaging.Further,the model of the mid-wave infrared thermal imaging camera is converted into a midwave infrared polarization imaging device to obtain the infrared polarization information of the target scene.This device uses a motor to ensure that the infrared polarizer can rotate at a uniform speed of 900 r/min and collects infrared intensity images in different polarization directions.A single pixel non-uniform differential image correction method is used to remove the cold reflection of infrared images,and the iterative sorting method is used to process an image with the corrected infrared intensity.In addition,based on the constructed Stokes vector model,computing the adjacent three consecutive intensity of infrared image of the infrared polarization and polarization angle,assurance and the intensity of the infrared image has the same imaging frame frequency.Experiment results show that the aforementioned device can achieve stable output of the infrared polarization degree and polarization angle with respect to the target to be measured.The frame frequency of the output infrared polarization image is 45 frame/s,which is in accordance with the real-time infrared polarization requirements for moving target detection.
作者
杨敏
徐文斌
田禹泽
孙振远
孙宪中
Min Yang;Wenbin Xu;Yuze Tian;Zhenyuan Sun;Xianzhong Sun(Science and Technology on Optical Radiation Laboratory,Beijing 100854,China;Beijing Electro-Mechanical Engineering Institute,Beijing 100074,China;Beijing Space Information Relay and Transmission Technology Research Center,Beijing 100094,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2020年第15期64-71,共8页
Acta Optica Sinica
关键词
成像系统
红外偏振成像
旋转偏振片
冷反射
迭代排序方法
imaging systems
infrared polarization imaging
rotary polarizer
cold reflection
iterative sorting method
