Phase Retrieval Of Optical Image Based On Two Imaging

Research shows that there are about 75% of the information in the optical field was contained in the phase.However,because of the frequency of the wave in optical field is very high,thephase distribution of the wave function can't be detecteddirectly.Phase retrieval problem is a technique that retrieves phase information from the known density distribution information.This missing phase information has very important applications in many physics fields,so the phase retrieval problem is very important.The phase retrieval problem has been studied extensively.In the 70's,two scholars Gerchberg and Saxton proposed the classical iterative phase retrieval algorithm – GS algorithm,which is an iterative phase retrieval algorithm based on Fourier Transform Theory.After that,many scholars have studied and improved GS algorithm,such as error reduction algorithm,hybrid input output algorithm and YG algorithm,which are efficient iterative phase retrieval algorithms.A new phase retrieval algorithm of the optical imagebased on two imaging is proposed in this paper.Firstly,the background and significance of phase retrievalaresummarized,theresearch resultsofphaseretrievalstudiedbydomesticandforeignscholarsare introduced.Secondly,the optical diffraction theory is introduced,and a simplified optical imaging system model isgiven according to Fresnel diffraction,then,the relationship between two wave functions of the image is obtained,that is,they approximately satisfy Schrodinger Transform.Thirdly,the basic problem of amplitude and phase in general optical system and YG algorithmis introduced.By using Schrodinger Transform of the image and YG algorithm,the phase retrieval of the optical image is realized,and the simulation experiments of the new phase retrieval algorithm were carried out.Experimental results show that the retrieval phase image contains some basic information of the optical image,and the algorithm can reconstruct the optical image.Finally,the retrieved phase is appliedto improvethe image quality and the image of the gradual process of the image,then the simulation experiments were given.