摘要
为了弥补传统分时型长波红外偏振成像系统不能实时探测的不足,本文通过采用超高速高定位精度旋转轮,在分时型红外偏振成像装置的基础上,实现了准实时动态高温目标偏振度图像的探测。采用超高速高定位精度旋转轮,快速带动偏振片旋转,改变了目标信息的偏振态,红外相机同步采集图像数据,每4幅不同角度的光强图,解算出偏振度图,循环此过程,得到运动目标偏振度视频数据,使装置能够实现运动物体的偏振探测。利用软件控制整个装置成像过程,由于实验所用红外相机帧频的限制,所以整个装置实现了15帧/s的目标偏振度探测,得出目标偏振度变化曲线,以及强度图与偏振度图的融合结果。本文研究的基于高速旋转轮的分时型长波红外偏振成像,在具有传统装置优点的基础上,可以实现探测15帧/s的动态高温运动目标的偏振度图像。该装置在未来的火场救援、燃烧诊断和高温目标的精细成像等领域,具备潜在应用价值。
In order to make up for the shortcomings of the traditional division-of-time long-wave infrared polarization imaging system,image detection of the real-time dynamic high-temperature target polarization degree can be realized by using the ultra-high-speed and high-position precision rotating wheel on the basis of division-of-time infrared polarization imaging device.Using ultra-high speed and high positioning precision rotating wheel,the polarizing plate is rotated rapidly,the polarization state of the target information is changed,the infrared camera synchronously collects image data,and the intensity map is calculated for each of four different angles,and the polarization degree map is calculated and cycled.The moving target polarization degree video data is obtained,so that the device can realize polarization detection of the moving object.Using software to control the imaging process of the whole device,due to the limitation of the frame rate of the infrared camera used in the experiment,the whole device realized the target polarization degree detection of 15 frames/s,and obtained the target polarization degree curve,as well as the result of the fusion of the intensity map and the polarization degree map.The division-of-time long-wave infrared polarization imaging based on highspeed rotating wheel in this paper can realize the polarization degree image of dynamic high-temperature moving target of 15 frames/s based on the advantages of traditional devices.The device has potential application value in the fields of future fire rescue,combustion diagnosis and fine imaging of high temperature targets.
作者
张哲
刘欣悦
王建立
姚凯男
李天赐
ZHANG Zhe;LIU Xin-yue;WANG Jian-li;YAO Kai-nan;LI Tian-ci(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing100039,China)
出处
《液晶与显示》
CAS
CSCD
北大核心
2019年第5期508-514,共7页
Chinese Journal of Liquid Crystals and Displays
关键词
长波红外偏振
运动目标
偏振探测
long-wave infrared polarization
moving target
polarization detection
