Computer Optical Methods To Change The Optical Field Distribution

In the light wave's and the electromagnetic wave's application, according to the different request, people need to alter field's distributing to satisfy the need of actual application. The recent articles show that the method of computer optics could realize the altering field of light distributing in light wave and microwave band. In this paper, with the basis of scalar diffraction theory, we used the means of computer optics and visual CVF(Compaq Visual Fortran), established designs software LZCOE witch consist of visual parameter input interface, program's automatically run and result'manage and display. It is facilitates, simple and is used in extensive range. With the software we design reflecting computer optical element in light wave band and microwave band, and transmission computer optical element in light wave band. It mainly composed of the theoretical analysis of elements, software design and computer simulation.Firstly, the paper gives a detailed analysis of the design of computer optical element. We researches scalar diffractive theory mainly. With the basis of this analysis, the paper gives a new optimized design method for a reflecting computer optical element. For designing a transmission computer optical element, it gives a method to improve the traditional GS(Gerchberg-Saxton)algorithm by the method of calculate phase while designing reflecting element, and gains initial data.With the basis of these designs, the paper develops the software of reflecting element and transmission element based on FORTRAN 90. The software can easily realize the design of the element of each image which is given,and also solves the problems of traditional Matlab software, such as the poor of program iteration, unfriendly user-interface, etc. With the software, the relief height and the designed element are got, and the results agreed with the expected patterns. This article designs the elements which can shape the laser beam special shape and several aimed pattern shapes. This simulation results and expected results are matching. For reflecting element, elements are designed in light wave bands (visible and infrared light), and a element also designed in millimeter wave band. For transmission element by the improved algorithm, elements are also designed in light wave bands (visible and infrared light), and are compared with ones of designed by the traditional GS algorithm.This paper shows an analysis of the simulation results from above design theories and draws a conclusion with a reference value in some extent. All these give us an instructive meaning for the design of computer optical elements in the future.