The Simulation Analysis On Glass Molding Process Of Microstructured Optical Components

The microstructured optical components with the characteristics of micro structure on the surface can improve the image quality, correct aberration and enhance the quality of the optical imaging system. Glass molding process(GMP) technology has the advantages of high machining precision and stable mass production, and it is not only suitable for the formation of complex surface of aspherical surface, but also for the microstructured optical components. Due to the small size of glass component, the method of molding microstructure optical components has many defects, such as poor size transformation and unsatisfactory filling performance. Those defects affect the shape precision and surface quality of the optical components seriously. Therefore, it is of great practical significance to study the effect of different factors on the forming accuracy of micro structure.Finite element method applied in GMP can achieve the prediction of filling performance, stress and strain, surface deformation and the optimization design of mold. With this method, the product development cycle will be shorted and the quality and performance of products will be improved. In this paper, the main contents studied by using simulation software MSC.Marc can be summarized as following:(1) With reasonable assumptions and simplifi cation of actual model, the V groove array of finite element analysis model is established by using software MSC.Marc. The constitutive model of glass and the method of applying the boundary conditions of the simulation model are studied respectively.(2) The temperature field of glass and mold under different heating method were analyzed in order to analysis the difference of temperature field between glass and mold under two kinds of heating methods firstly. Then the deformed optical components’ stress distribution of different molding process parameters(molding temperature, molding velocity and frictional coefficient) was discussed. The V groove array’s filling performance of different molding process parameters(molding temperature, molding velocity and molding time) was discussed at last.(3) With software MSC.Marc, the filling properties by using concave and convex mold respectively were analyzed firstly. Secondly, the influences on filling properties by using concave mold were studied. At last, 2D simulation models were established including V groove, rectangular groove, trapezoidal groove and circular groove and the forming property of different shapes of micro groove die were analyzed.