## 3 Research Purpose and Moldflow Simulation Process  
This paper focuses on the mass production of optical polymer white light material products with a molding design that negates the need for major secondary processing. The residual birefringence evaluation method can determine the residual stress increase trend using the polarization measurement and the photoelastic measurement methods. The stress force distribution on the transparent biaxial material can be directly observed,and the experimental simulation analysis is able to obtain the best manufacturing process, in terms of the effect of the optical lens, by finding the most suitable measurement method to investigate the influence of residual birefringence on the optical quality of the aspheric lens. When the recognizable stress value of the product has been detected, and the results of the photoelastic measurement of the residual birefringence in the optical component are digitized, then the related big data can be obtained. This is of great significance in realizing the intelligent transformation and application of the product in the manufacturing industry.  
Polymer processing rheology is used to establish the mold flow simulation analysis of basic heat transfer to create a physical and mathematical model of the flow and heat transfer of the molten plastic in the mold. This model can simulate the change of the molten plastic during the injection molding process, and observable temperature and pressure state changes during this process can be used to solve issues such as the long period needed for mold design in the past and the inability to conduct a comprehensive analysis of materials and design schemes to find a better molding scheme (as shown in Figure 1). The use of mold flow simulation analysis help designers, in the initial mold design, to understand the influence of molding parameters on the structure and performance of plastic parts.  
Mold flow simulation analysis provides a scientific basis for designing products, including: 1. Molded product design--understanding the impact of product thickness, gate location and quantity, and runner system design, on product quality. When providing accurate data to designers, it is not necessary to rely solely on the designer's experience to find the best product design, which greatly reduces the design time. 2. Plastic mold design--optimizing the mold size, gate position, gate number, gate type, runner size and cooling system to simulate the trial conditions of various design methods, which has the potential to reduce the number of mold repairs after the mold is opened, thus significantly reducing the idle time required during mold repair, as well as improving mold quality. 3. Molding parameters--as the injection molding process is simulated, possible defects in the molded product can be found, and parameters such as mold temperature, plastic temperature, injection pressure, and holding pressure can be adjusted to determine the best molding parameters, which improves product molding quality and reduces trial time. Mold flow analysis technology is widely used to reduce the molding design cycle, improve production efficiency, and ensure product quality, thereby reducing costs; predictions such as filling, holding pressure, cooling, and warpage of the product can be carried out, and the design method of the product and the influence of cooling time can be discussed.  
Figure 1: Moldflow simulation process for white light components.