Studies On Simulation And Manufacturing Technology Of Microlens Array Molding

With the development of technology,microlens array optical components regulate and utilize the physical properties of light waves in the infrared,visible,ultraviolet?UV?/extreme ultraviolet?EUV?and even X-ray bands to achieve functions that are difficult to achieve with conventional optical components.It has important application value in the development of modern optical technology.Array optics are gaining increasing attention due to their ability to be formed in one pass by a molding process.The finite element simulation method is used to simulate the optical glass molding process,and the selection method of the optical glass molding process parameters is discussed.This is also an effective way to study the molding manufacturing technology of array optical components.In this paper,based on the above content,the finite element simulation analysis and manufacturing technology of microlens array molding are carried out.The research idea of using finite element simulation software to simulate the optical glass molding environment and then analyzing is introduced.Second,the optical glass molding the numerical analysis of finite element simulation method,and the establishment of simulation model is studied.Drawn by FEM simulation software simulation environment molded optical glass,and thus an optical glass element molding process analysis and optimization research ideas.For the part of finite element simulation analysis,the molding material used in this paper is the chalcogenide glass material Ge₂₃Se₆₇Sb₁₀.According to the thermal characteristics of the glass,the finite element simulation software MSC.Marc is used to simulate the molding process of the sulfur-based optical glass element to establish a simulation model.The stress distribution in the die forming cavity and the change trend of mises stress in different microstructure heights with the same microstructure width in the die forming process of optical glass components were studied.The moldability of the material array optical components was obtained based on the experimental results of Chalcogenide glass Ge₂₃Se₆₇Sb₁₀ and xi'an university of technology.Then the selection method of molding process parameters is analyzed and the distribution of equivalent stresses on the upper and lower surfaces of the molded components is studied.The results show that the height is small,when the microstructure of chalcogenide glass materials,easy to fill microstructure shows that the sulfur resistance smaller fill microstructure array of glass;As the height of the microstructure increases,the equivalent mises stresses are increasing,the filling effect becomes worse,and the resistance of the Chalcogenide glass filled microstructure array is increased.At the same height of the microstructure,the resistance at the edge position is greater than that at the center position,resulting in stress concentration at the edge position and poor filling.Therefore,when the filling effect of the sub-lens at the edge position reaches the best,the sub-lens at the middle position of the array also achieves the best effect.Chalcogenide glass is brittle.When the microstructure is too high,the internal stress is too high,which leads to component damage.Therefore,when the optical element of sulfide glass microlens array is used in optical design,the microlens array with appropriate microstructure should be selected as far as possible.According to the Experimental results of chalcogenide glass can withstand the maximum stress,according to Kelly in 1973 study showed that the breaking strength of the ideal glass generally between elastic modulus of 1/10¹/20,about0.7³×10⁴,obtained chalcogenide glass Ge₂₃Se₆₇Sb₁₀10 maximum equivalent von mises stress is 30.218 MPa.Through finite element analysis method of chalcogenide glass Ge23Se67Sb10,array of optical element can be molded sex is analyzed,by using the finite element software analysis and data processing method of the combination of the glass optical element array can be molded,molding is microstructure minimum height and width ratio is 0.322,chalcogenide glass surface cracks began to appear.