轴向运动目标的热光高阶鬼成像研究  

Research of high-order thermal ghost imaging for an axial moving target

作　　者：梁振宇[1] 樊祥[1] 程正东[1] 朱斌[1] 陈熠[1] 

机构地区：[1]合肥电子工程学院脉冲功率技术国家重点实验室,安徽合肥230037

出　　处：《光电子．激光》2017年第5期547-552,共6页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61307025);安徽省自然科学基金(1308085MF114)资助项目

摘　　要：为了探讨光场的高阶关联对于轴向运动目标鬼成像成像质量的影响,将热光高阶鬼成像相关理论应用于轴向运动目标鬼成像的研究中。首先,建立了理想热光高阶强度涨落的轴向运动目标鬼成像模型,给出轴向运动目标高阶鬼成像的高阶关联函数;接着,设置不同仿真参数对建立的数学模型进行了数值模拟,同时给出了相关仿真图像;最后,采用峰值信噪比(PSNR)质量评价方法比较仿真图像的成像质量,并对仿真结果进行了分析。结果表明,对于轴向运动目标,随着参考光束的阶数增加,光场的高阶关联将会极大的增加背景涨落的噪声,导致图像重建质量急剧变差;而信号光束的阶数增加对成像质量影响较小,但是成像质量会随着信号光束的增加而增加,最低阶的鬼成像得到的鬼像质量最好。In order to investigate the impact of high-order intensity correlation of light field on axial moving t arget ghost imaging,this paper uses high-order ghost imaging theory in the research of axial moving target ghost imaging.Firstly,we e stablish a mathematical model of ghost imaging for axial moving target based on ideal thema l high-order intensity fluctuation,and the high-order correlation function is obtained.Then the simulation of mathematical model is carried out by setting different parameters,and the sim ulation images are given.Finally,we compare the image quality by using an evalution parameter o f peak signal to noise ratio （PSNR）,and then we analyze and discuss th e silulation images based on the evalution method.The results indicate that high-order intensity correlation of the light field can increase the background noise fluctuation with the increase of the reference beam orde r,and the qulity of reconstructed image becomes worse.Instead ,there is little effect on the image quality with the increase of the signal beam order,but the image quality of ghost imagin g for axial moving target is also degraded.In a word,the best quality can be obtained by the lowest -order ghost imaging.

关 键 词：鬼成像 高阶关联 轴向运动目标 成像质量 

分 类 号：O431.2[机械工程—光学工程]