正交线偏振光成像制导镜头的设计与仿真  

Design and Simulation of Orthogonal Linearly Polarized Imaging Guidance Lens

作　　者：吕金锦 祝青霞 路易 雷琦 赵峰 LYU Jinjin;ZHU Qingxia;LU Yi;LEI Qi;ZHAO Feng(State Key Laboratory of Geo-Information Engineering,Xi'an 710054)

机构地区：[1]地理信息工程国家重点实验室,西安710054

出　　处：《飞控与探测》2023年第2期23-28,共6页Flight Control & Detection

基　　金：国家自然科学基金项目(41876105,41371436)。

摘　　要：根据成像制导系统提高恶劣环境成像能力和识别真假目标能力的发展需求,研究设计正交线偏振光成像制导超透镜镜头。通过分析超透镜的偏振和相位调控原理,基于传输相位和矩形结构通过最小标准差匹配法设计了基于硅和氟化钡材料的中红外正交线偏振光成像超透镜,工作波长为3μm。利用时域有限差分法对正交线偏振光超透镜进行了仿真,验证偏振成像效果和计算偏振对比度。仿真结果表明,当超透镜数值孔径为0.21时,正交线偏振光聚焦效率分别为80.5%和80.8%,最大偏振对比度为13dB。According to the development requirements of the imaging guidance system to improve the imaging ability in harsh environments and the ability to identify true and false targets,an orthogonal linearly polarized light imaging guidance metalens was designed.By analyzing the polarization and phase regulation principle of the metalens,a mid-infrared orthonormal linearly polarized imaging metalens based on silicon and barium fluoride was designed by the least standard deviation matching method based on the transmission phase and rectangular structure.The working wavelength was 3μm.The finite-difference time-domain(FDTD)method was used to simulate the orthotropic linearly polarized metalens to verify the polarization imaging effect and calculate the polarization contrast.The simulation results show that when the numerical aperture of the metalens is 0.21,the focusing efficiency of orthogonal linearly polarized light is 80.5%and 80.8%,respectively,and the maximum polarization contrast is 13dB.

关 键 词：正交线偏振 成像 制导 轻量化 超透镜 

分 类 号：TJ02[兵器科学与技术—兵器发射理论与技术]