高阶光学强度相干成像的相位恢复方法改进  

Improved Phase Retrieval Method of High-order Optical Intensity Correlation Imaging

作　　者：高昕[1] 冯灵洁 陆长明[1] 李希宇[1] 唐嘉[1] 

机构地区：[1]北京跟踪与通信技术研究所空间目标测量重点实验室,北京100094 [2]北京空间信息中继传输技术研究中心,北京100094

出　　处：《光子学报》2017年第6期114-122,共9页Acta Photonica Sinica

基　　金：国家高技术研究发展计划(No.2011AA8080110)资助~~

摘　　要：为了提高强度相干方法对空间目标的成像质量,避免复杂的相位估计过程及其引入的额外误差,对高阶强度相干的相位恢复方法进行了改进.在对高阶强度相干相位测量信噪比定量讨论的基础上,选择三阶强度相干方法对远场目标测量过程进行仿真,针对相位解算过程中频谱模值传递噪声放大等问题,根据相位估计与相位测量结合的思路,提出了相位闭合正则项改进算法.通过室内强度相干成像实验,比较改进算法与最速下降法、先验信息迭代方法对相同测量结果的图像恢复效果.实验结果表明,改进算法得到的图像误差值低于原有方法,较为有效地提高了成像质量.To improve the imaging quality of intensity correlation method and avoid the complicated estimation and extra error,the phase retrieval procedure of high-order intensity correlation was ameliorated.Based on the quantitative discussion of the signal to noise ratio of high-order intensity correlation phase measurement,the third-order intensity correlation imaging was selected to simulate the far-field object measurement,according to which the magnifying of spectral modulus error is analyzed.To solve the problem that the spectral modulus would be magnified in the process of phase calculation,the phase closure regularization algorithm of improved phase retrieval was proposed combining phase extimation and phase measurement.Further,the effectiveness of the improved method was verified in the designed indoor experiment by comparison with previous methods of the steepest decent mthod and prior information iteration method.The results show that image error caused by the proposed method is lower than that of the previous methods,which improve the quality effectively.

关 键 词：空间监视 图像重构 傅里叶光学 相位测量 信噪比 

分 类 号：O428.2[理学—声学]