摘要
相干光的位相信息很难通过成像光学系统直接获得。目前比较先进的方法是利用相干衍射成像方法进行位相恢复,但其成像视场较小,对于结构稍复杂的物体容易出现图像重建停滞的现象。因此,研究了边界条件对相干衍射成像方法的影响。在传统相干衍射成像方法的基础上,根据混合输入输出法和外推法的不同组合对迭代变换算法进行改造,形成了新的迭代变换算法。实验结果表明:对于单一边界条件的位相恢复方法,估算的位相和理想位相偏差的RMS仅为0.0096λ;对于双边界条件的位相恢复方法,检测偏差的RMS小于0.0012λ。新迭代变换算法对于相干光的位相恢复具有十分重要的应用价值。
Phase information of coherent light is difficult to obtain directly through the imaging optical system. At preent, the more advanced method is to use coherent diffraction imaging method for phase recovery, but its imaging field of view is relatively small, and it is easy to appear the phenomenon of image reconstruction stagnation for objects with slightly complicated structure. Therefore, the effect of boundary conditions on coherent diffraction imaging method is studied in this paper. On the basis of the tradkional coherent diffraction imaging method, the transformation of the iterarive conversion algorithm is focused on according to the different combination of the hybrid input and output method and the extrapolation method, and three new iterative conversion algorithms are formed. The contrast experiment of co herent diffraction imaging method based on three new iterative transformation algorithms is designed by using interfero metric test method. The experimental results show that the RMS value between the estimated phase deviation and ideal phase deviation is only 0.0096 λ for the phase recovery method with single boundary condition, and the detection deviation RMS value is less than 0.0012 λ for a phase recovery method with dual boundary conditions. This method has very important application value for phase recovery of coherent light.
作者
赵致远
景文博
邹欢欢
ZHAO Zhiyuan;JING Wenbo;ZOU Huanhuan(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022;School of Electronics and Information Engineering,Changchun University of Science and Technology,Changchun 130022)
出处
《长春理工大学学报（自然科学版）》
2018年第6期55-58,70,共5页
Journal of Changchun University of Science and Technology(Natural Science Edition)
关键词
相干衍射成像
迭代算法
位相恢复
coherent diffraction imaging
iterative algorithms
phase recovery
