一种利用先验信息的可见光域相干衍射成像方法

摘要

We propose a visible light coherent diffraction imaging method.The method employs a known standard object as a priori information in the object plane.Illuminating the tested sample and the coalition of the sample and the standard object,respectively,two diffraction patterns can be obtained to reconstruct the complex amplitude of the sample by the proposed iterative algorithm.We show the validity of the method via both numerical simulations and optical experiments.Since only two diffraction patterns are needed to achieve the lensless imaging,our method is simple to implement and has a high application potential.%提出一种可见光域的相干衍射成像方法.该方法在待测样品面引入一个已知的标准物体作为先验信息,并通过控制激光光束的照明范围得到2幅不同输入信息下的衍射图.依据这2幅衍射图和已知的先验信息,使用本文提出的相位恢复算法,在计算机数值模拟和光学实验中重建待测样品的复振幅信息.该方法仅需2幅衍射图即可进行无透镜成像,因此其成像过程较为简便,具有一定的实用价值.