傳統背光模組所使用之光學膜片通常在表面加工微結構以改變其光學特性，不同於傳統製程在表面製作微結構的方式，本研究提出獨特且新穎的製程，主要使用UV (ultraviolet) 雷射光，以雷射直寫對玻璃內部做內嵌式微結構加工，雷射加工後玻璃與原本玻璃光學特性不同，藉由此特性設計單層或多層微結構於玻璃內部，使入射到玻璃內部的光線可改變出光特性。而設計不同的微結構組合可達到導光兼具聚光或均勻擴散的效果。透過微結構內嵌於玻璃的設計，可有效提升出光效率與出光均勻度，亦可突破傳統光學模組專利的保護範圍。首先由FRED光學模擬軟體模擬光學模組，經由模擬預測內嵌單層及多層微結構排列於玻璃內的光學特性，接著使用雷射頻率為30kHz，脈衝寬度為15ns，雷射能量約2.5到2.6W間的UV雷射參數進行雷射直寫加工。本研究著力於UV雷射點內嵌於玻璃基板其光學性質的探討，探討主要的排列參數(點與點的距離、層與層之間的距離及結構層數)與其光學性質之間的關係。UV雷射直寫突破傳統製程的多道手續以及降低製作較複雜微結構的困難度，而內嵌也使得微結構表面擁有不易受損及汙染等優點。最後以分光色度計(Photo Research PR650)量測不同內嵌微結構排列的試片之優勢與效能以驗證模擬結果。

Microstructures are usually fabricated on the surface of optical sheets to improve the optical characteristics. In this study, a new fabrication process with UV (ultraviolet) laser direct writing method is developed to embed microstructures inside the glass. Then the optical properties of glass such as reflection and refraction indexes can be modified. Single- and multi-layer microstructures are designed and embedded inside glasses to modify the optical characteristics. Both luminance and uniformity can be controlled with the embedded microstructures. Thus, the glass with inside pattern can be used as a light guide plate to increase optical performance. First, an optical software, FRED, is applied to design the microstructure configuration. Then, UV laser direct writing with output power: 2.5~ 2.6 W, repetition rate: 30 kHz, wave length: 355nm and pulse duration: 15ns is used to fabricate the microstructures inside the glass. The effect of pattern dimension such as the pitch, the layer gap, and the number of layer on the optical performance is discussed. Machining capacity of UV laser is ranging from micron to submicrometer; hence various dimensions of dot, line width, and layers can be easily embedded in the glass by one simple process. In addition, the embedded microstructures can be fabricated less damage and contamination. Finally, the optical performance of the glasses with various configurations is measured by using Spectra Colorometer (Photo Research PR650) and compared with the simulated results.

目錄 I
圖目錄 III
表目錄 VI
中文摘要 VII
ABSTRACT VIII
第一章 緒論 1
1.1 前言 1
1.2 研究背景 2
1.3文獻回顧 7
1.4 研究動機與目的 10
第二章 製作原理 12
2.1 光的性質與特性 12
2.2 UV雷射簡介 16
2.3 FRED光學模擬軟體 20
第三章 內嵌微結構的設計與製造 23
3.1 設計製造流程 23
3.2 FRED模擬軟體設定 24
3.2.1 LED光源設定 25
3.2.2 內嵌微結構設定 27
3.2.3 分析面設定 29
3.2.4 微結構模組設置 30
3.3 雷射加工流程與參數設定 38
3.4 量測設置與單位 41
3.4.1 量測設置 41
3.4.2 量測與模擬單位 44
第四章 結果與討論 46
4.1模擬結果 46
4.2 實驗與量測結果 48
4.2.1 初步試驗 48
4.2.2 量測結果 51
4.3 討論 55
4.3.1 模擬結果討論 55
4.3.2 量測結果討論 59
第五章 結論與未來展望 66
5.1 結論 66
5.2 未來展望 67
參考文獻 68

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