| Summary: | 碩士 === 國立高雄應用科技大學 === 模具工程系碩士班 === 101 === For plastic injection molding optics product, optics parts design and process optimization were the most important topics. Optical lens is the main demand. Many studies of optical products technology has been developed. In the process of optical lens production, Surface shrinkage, warpage, sink marks, jetting and residual stress in the product manufacturing process would be happened cause of poor design. In this study, an astigmatic LED-Lens would be discussed and material is PMMA. An optical lens is 17.75mm diameter and 4.03mm thickness. Taguchi method was used to get the best shape design and process parameters.optimization. LightTools was applied to simulate light distribution of the optical lens. Moldflow was applied to simulate the molding conditions and to predict shrinkage issues. Matlab was applied to become the Shrinkage compensation. To improve the distribution and uniformity of light. Use surface profiler, photoelastic and luminance meter (BM7) to verify the shrinkage, residual stress and luminance distribution of the LED-Lens. The result get a irregular surface shrinkage compensation method and curve equation. The research show luminance uniformity improve to 60% than original design to 50%. It can effectively improve the luminance uniformity 10% of the value. When the product has shrinkage and residual stress, the luminance uniformity is reduced to 40% and 47% of the optical lens.
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