本研究主要是利用準分子雷射透過一個光罩圖案之後，分析在高分子材料上(聚碳酸酯)進行單向或交叉拖拉後的加工形廓和微結構變化情形。為了在拖拉過程中能有效預測加工後之形廓變化，需要發展一個描述雷射加工參數和形廓變化的數學模型。此數學模型將利用實驗方式來驗證其準確性。

本研究呈現了實驗和數值模擬結果。這些結果是藉著改變不同形狀的光罩和不同的實驗參數去進行雷射單向和雷射交叉拖拉的結果。這些實驗參數包括拖拉速度、脈衝重覆頻率、脈衝數、能量密度和光罩圖案的尺寸。從實驗和模擬結果得知，它們兩者之間的誤差值是小於14 %。

依據提出的數學模型，我們可藉由改變雷射加工參數、光罩形狀和尺寸去製作出微小化的車燈透鏡結構。為了證明微小化透鏡結構較傳統的透鏡結構在光學上具有較佳的優點，本研究利用光學模擬方法對這些微小化的透鏡結構進行分析。模擬結果說明微小化的車燈透鏡結構較傳統的車燈透鏡結構可以提供較佳的光學效率。

A laser dragging process to ablate a groove pattern and more sophisticated 3D features on a polycarbonate (PC) sheet through a shape of mask opening is analyzed. To predict the machined profile during the dragging process, a mathematical model describing the relationship between laser machining parameters and the produced profile is developed. The proposed model is verified experimentally.

This study depicts the results of the experiment and numerical simulation in both single and cross dragging using elliptic, triangular and rectangular masks. The operating parameters include the dragging velocity, pulse repetition rate, pulse number, fluence and the opening dimension of the mask pattern. A good agreement between the experiment and simulation with deviation less than 14% is demonstrated.

Based on the proposed model, miniature lamp lens can be manufactured by varying laser operating parameters, mask shape and dimensions. Further, the advantage of the micro-size lamp lens on light efficiency is explored. The results illustrate the optical systems with the micro-feature lamp lens can offer better optical performance than those with macro-feature lamp lens.

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