- 學位論文
精密拋光面在玻璃模造上之轉寫效益研究
The Transcription effects of precised polishing surface on glass molding
摘要
微陣列透鏡已成為光學系統中的重要元件，將光的能量均勻化是微陣列透鏡的其中一個應用，利用玻璃模造技術製作透鏡是非常有效的方法；不過要製作高精度透鏡，用來壓製玻璃透鏡的模仁精度就非常重要，並且使用的玻璃材料，可應用於高能環境或極端環境條件中，但因為一般模仁形狀都過於複雜，拋光不易，故本研究利用超音波的高速振動以及拋光棒的往復作動來提升拋光效果。 本研究首先要找到高溫玻璃模造機的溫度、壓力等最佳參數，量測工件在模造過後，不會造成工件的表面粗糙度變化，再來使用Auto CAD繪圖軟體畫出sine波形模仁的輪廓，轉成NC程式之後，接著利用線切割加工機（WEDM）來製作模仁，然後對複雜工件進行超音波輔助拋光，探討拋光過後工件表面的改善率，並利用單因子實驗找出最佳的參數，根據量測結果，經過幾次拋光，試片表面粗糙度可從原先的Ra 0.2μm 改善到Ra 0.012 μm，而製成的玻璃陣列透鏡轉寫率也可達到93％，表面非常均勻化。
並列摘要
The micro-lens array has become an important component of the optical system. The uniform distribution of light energy is one of the applications for a micro-lens array. It is an effective method to produce lenses by using the glass molding technology. However, the higher accuracy of mold cores is important regarding higher quality of lens products. Besides, the glass material is suitable to use in the fields of high temperature and extreme environment. The shape of mold core is not easy to polish due to the complex geometry. Therefore, a mixed mechanism include ultrasonic lapping and polishing rod machine, which combine the functions of ultrasonic vibration and high-speed reciprocating polished to enhance the surface precision. In this study, the optimal parameters regarding manufactory process of glass molding, includ temperature, pressure, and other parameters. The main purpose focus on the stable situation to measure the surface roughness of workpieces. Next, the outline of mold core with a sinusoidal waveform can be drawn by the AutoCAD software, the data of which to a NC program via a CAD/CAM system. In the end, the product of a mold core is made by wire electrical discharge machining (WEDM). The improvement rate of workpiece surface roughness can be calculated to verify the polishing effects. Moreover, the one factorial experiment is adopted to verify the optimal combination of design parameters and factors of a mixed mechanism. Finally, the experimental results revealed that the surface roughness significantly decreased from Ra 0.2 μm to Ra 0.013 μm after several machining cycles. In addition, the transcription rate of the glass-lens array can reach 93%; this proved to be an excellent solution to meet the requirement of surface uniformity.