不對稱形非球面塑膠光學鏡片成型技術之研究

The Study of the Injection Molding Technology for the Asymmetrical Aspherical Plastic Lens

洪實孝(Shr-Shiau Hung)

指導教授 ： 謝振瑜

共同指導教授 ： 林忠志(Chung-Chih Lin)

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所/碩士(2010年)

摘要

本論文主要研究非對稱型非球面塑膠光學鏡(Aspheric Plastics Lens)之設計與製造。非對稱型非球面塑膠光學鏡應用在用於微型投影機光電系統中可以改善光學品質，本文利用聚碳酸酯（Polycarbonate）的光學級塑膠用料、利用CAE軟體VISI-FlOW模擬並配合非球面光學分析軟體AAU(Aspherics Analysis Utility)，尋找出鏡片X軸與Y軸對稱性的尺寸最佳化，同時分析影響不對稱形非球面塑膠鏡片的形狀精度與雙折射率的原因。本研究使用的模具材質分別為STAVAX- HRC52°及鈹銅兩種不同材質製作模仁，進行射出成形的實驗。
由實驗結果得知影響雙折射率的關鍵因子為模仁材質特性、模具溫度與螺桿溫度，其次則為射出成型機的參數設定。而對於非球面塑膠鏡片表面輪廓精度影響最為顯著的因素依次是保壓時間、保壓壓力、模具溫度、螺桿溫度、冷卻時間、射出速度等。本論文提供完整的設計研究到成形的實驗確認，可作為非對稱型非球面塑膠光學鏡的研究參考。

關鍵字

非球面塑膠光學鏡片 ； 射出成型 ； 模流分析

並列摘要

In this study, a design and manufacture methodology for aspheric plastics lens is proposed. Aspheric plastics lens can improve the quality of the mini projector lens module and are more important in this field. In order to find the optimal processing parameters of the lens, a optical grade of Polycarbonate (PC) is selected and the CAE software VISI-FlOW as well as optical analysis software Aspheric Analysis Utility (AAU) are used to determine X and Y symmetrical dimensions of the lens respectively. In addition, the causes to the accuracy and birefringence index are also studied. The material of the mold inserts are STAVAX- HRC52° and beryllium-copper respectively.

From the results, the influence factors of the birefringence index are the material of mold insert, mold temperature, melt temperature and injection molding parameters. The influence factors of the birefringence index are hold time, hold pressure, mold temperature, melt temperature, cooling time and injection velocity, respectively. Both design and manufacture parameters influence the quality of aspheric plastics lens are studied and the conclusions are proposed in this dissertation.

並列關鍵字

Aspheric Plastics Lens ； Injection Molding ； Mold Flow Analysis

參考文獻

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