基于模拟退火算法的合成孔径相位误差校正  

Synthetic aperture phase error correction based on simulated annealing algorithm

作　　者：孟咪莎 于洵[1] 聂亮[2] Meng Misha;Yu Xun;Nie Liang(School of Armament Science and Technology,Xi'an Technological University,Xi'an 710021,China;School of Optoelectronic Engineering,Xi'an Technological University,Xi'an 710021,China)

机构地区：[1]西安工业大学兵器科学与技术学院,西安710021 [2]西安工业大学光电工程学院,西安710021

出　　处：《电子测量技术》2022年第7期93-98,共6页Electronic Measurement Technology

基　　金：陕西省教育厅重点科学计划研究项目(20jy029);西安市科技计划项目(2020JKRC0030)资助。

摘　　要：为实现光学合成孔径成像系统的高分辨率成像,必须校正子孔径间的相位失调误差。采用单色光照明,建立双孔径成像系统模型,分析相位失调误差中平移误差和倾斜误差对光学系统的影响,以系统调制传递函数积分值作为评价函数,采用模拟退火算法对相位失调误差进行在线校正仿真,对校正完成的光学系统进行系统性能评价。仿真结果表明给定特定的相位失调误差时,模拟退火算法能够很好地校正光学系统的相位失调误差。由于算法具有随机性,采用50组随机误差进行校正仿真,结果表明校正后的系统调制传递函数积分值指标均能收敛,校正后的斯特列尔比大于0.8,波前峰谷值小于0.57λ,波前均方差值小于0.10λ。In order to realize the high-resolution imaging of the optical synthetic aperture imaging system,the phase misalignment error between the sub-apertures must be corrected.Using monochromatic light illumination,establish a dual-aperture imaging system model,analyze the influence of translation error and tilt error in the phase misalignment error on the optical system,use the integral value of the system modulation transfer function as the evaluation function,and use the simulated annealing algorithm to perform online phase misalignment error Calibration simulation,system performance evaluation of the optical system after calibration.The simulation results show that given a specific phase misalignment error,the simulated annealing algorithm can correct the phase misalignment error of the optical system well.Due to the randomness of the algorithm,50 sets of random errors are used for calibration simulation.The results show that the integrated value indicators of the modulation transfer function of the corrected system can all converge,the corrected Strehl ratio is greater than 0.8,and the peak-to-valley value of the wave front is less than 0.57λ,The mean square error of the wavefront is less than 0.10λ.

关 键 词：光学合成孔径 相位失调误差 平移误差 倾斜误差 模拟退火算法 

分 类 号：TB133[机械工程—光学工程]