Research On Light Field Calculation And Phase Retrieval Method

Recently, the phase retrieval algorithm has been a very important research field, mainly because of its application in signal recovery and designing diffractive optical elements. In that field, the GS algorithm, IFT algorithm and Y-G algorithm are very representative. So far, mainly jobs of phase retrieval algorithm research have focused on improving the convergence speed and the precision.In this paper, the author studied the significance, origins, and development of the phase retrieval algorithm, detailedly introduced all kinds of methods of obtaining the phase distribution by repeatedly iterates the light intensity and by solving the transmission equation of light intensity distribution. Usually GS algorithm falls into a statement of local minimum, which causes that the computation course falls into nearly completely stagnancy. Therefore, in this paper, an advanced version GS algorithm has been designed,which uses a parameter to create a weighted average of the intermediate calculated results and then gives a new initial phase condition. Therefore the initial phase condition can be switched quickly and randomly to overcome this disadvantage, and the simulation experiment proved the feasibility of the algorithm.In addition, the WEB service is a hotspot of the development recently, and it is a brand-new means of information exchange. In this paper, we proposed a solution of WEB service based on phase retrieval, and simply introduced the WEB service. The specific problems in realization were also studied. The simulation test was done so that we proved the feasibility of the algorithm.