臺灣博碩士論文加值系統

本研究主要目標在於藉由雷射誘發電漿爆破產生散射光的方式，產生一高強度、肉眼目測為綠色且環繞可視之立體投影。我們使用高功率被動Q開關之閃光燈脈衝雷射，經過倍頻轉換產生綠光，聚焦爆破產生綠光之散射。我們也針對產生之綠光散射進行90度光譜、時域上作進一步的了解，接著我們也對綠光散射之角度分布及焦點上之影像進行較深入的討論，針對輸入能量、聚焦前的光束直徑以及爆破閥值相關的特性進行分析。最後並展示雷射爆破產生有色光影像之可行性。

The main goal of this research is to propose a new method of producing 3D visual image with high intensity 532 nm light source, and can be viewed from all 360 degrees. We use a high peak power, passively Q-switched flash-lamp laser and frequency-doubling technique, we can produce a 532 nm scattering light from laser-induced breakdown. We explore the consequence of 532 nm scattering and laser-induced breakdown by studying 90-degree spectrum and time-domain analysis. Further on, we discuss how different input energy, spot size and breakdown threshold affect focal point image and focal point image. These results show the possibility of visual-light 3D image by laser-induced breakdown.

中文摘要 .….………………………………………………………………………...i
英文摘要 ………..…………………………………………………….…………….ii
目錄 ………………………………………………………………………………...iii
圖表目錄 ………………………...………………………………………………….v
一、 　　緒論 ………………………………………………………………………1
1.1　　研究動機 ……………………………………………………………...1
1.2　　論文架構 ……………………………………………………………...3
二、 原理及研究方法 …………………………………………………………4
　　2.1　　激發光源 ……………………………………………………………...4
　　　　2.1.1　　Nd:YAG雷射 ………………………………………………….4
　　　　2.1.2　　Q開關雷射機制及原理 ……………………………..............12
　　　　2.1.3　 磷酸氧鈦鉀(KTP)倍頻晶體機制及原理 ……………………16
　　2.2　　雷射誘發爆破及電漿產生 ………………………………………….18
三、　　實驗方法與架構 ………………………………………………………..20
3.1　　閃光燈雷射 ………………………………………………………….20
3.2　　雷射誘發爆破產生散射之時域量測架構 ………………………….22
3.3　　雷射誘發爆破產生光譜之量測架構 ……………………………….24
3.4　　雷射誘發爆破產生散射之角度分布量測 ………………………….26
3.5　　雷射誘發爆破焦點影像之量測 …………………………………….29
四、　　實驗結果與討論 ………………………………………………………..31
　　4.1　　雷射誘發爆破閥值之分析與討論 ………………………………….31
　　4.2　　雷射誘發爆破產生散射之時域分析與討論 ……………………….34
　　4.3　　雷射誘發爆破產生之光譜 ………………………………………….36
　　4.4　　雷射誘發爆破產生散射強度之角度分布 ………………………….38
　　　　4.4.1　　輸入能量與散射光角度分布之關係 ………………………..39
　　　　4.4.2　　光束直徑與散射光角度分布之關係 ………………………..47
　　　　4.4.3　　越閥值與散射光角度分布之關係 …………………………..56
　　4.5　　雷射誘發爆破焦點影像之分析 …………………………………….64
五、　　結論與未來展望 ………………………………………………………..75
參考文獻 …………………………………………………………………………..76

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