利用體積全像光學元件之擴瞳光導效率提升技術

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姓名

林崇瑋(Chung-Wei Lin) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

利用體積全像光學元件之擴瞳光導效率提升技術
(Efficiency Enhancement of Exit Pupil Expansion Light Guide with Volume Holographic Optical Element)

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至系統瀏覽論文 (2029-8-1以後開放)

摘要(中)

本研究的目的是利用一片體積全像光學元件(Volume Holographic Optical Elements, VHOE)製作的穿透式光柵色散元件，取代原有的白光LED，以提升由兩片VHOE所組成之光導系統繞射效率。通過優化設計，不僅提高光導系統輸入輸出的能量轉換效率，還減少所有光學元件的能量損耗。
當光源在光導中傳遞時，由於體積全像片的特性，入射到全像片的角度公差會對應到不匹配的波長，從而產生濾波效應。為了解決此問題，本研究使用相位疊加法（VOHIL）理論模型來模擬光在光導系統中傳輸後的頻譜分布。根據模擬結果，將進行色散元件的模擬與設計，確保色散元件提供的頻譜分布與視野皆與光導系統匹配，以達到最佳能量利用率。此外，考慮到光在各元件之間的能量損耗，我們重新設計了色散元件，用以提高收光效率並縮短各元件之間的距離。最後，通過改變白光LED的發光寬度，降低色散元件的繞射頻寬，從而進一步優化光學系統的效率。

摘要(英)

The study aims to use a transmission grating dispersion element made from a volume holographic optical element (VHOE) to replace the original white LED, enhancing the diffraction efficiency of a lightguide system composed of two VHOEs. Through optimized design, we not only improve the system′s efficiency but also minimize energy loss across all optical components.
When light travels through the optical guide, the volume holographic plates cause filtering effects due to changes in the incident angle. To solve this, we used Volume Hologram Being an Integrator of the Lights Emitted from Elementary Light Source (VOHIL) model to simulate the spectral distribution in the system and designed the dispersion element to match the optical guide system for optimal performance. Additionally, we redesigned the dispersion element to improve light collection efficiency and reduce component distances, minimizing energy loss. Finally, we optimized system efficiency by adjusting the emitting area of the white LED to reduce the diffraction bandwidth of the dispersion element.

關鍵字(中)

★ 體積全像
★ 相位疊加法
★ 體積全像色散元件
★ 光機系統效率

關鍵字(英)

★ volume holographic
★ VOHIL model
★ system efficiency enhancement

論文目次

目錄 I
摘要 IV
Abstract V
致謝 VI
圖目錄 VIII
表目錄 XI
第一章緒論 1
1-1 背景介紹 1
1-2 全像術之文獻回顧 2
1-3 研究動機 3
1-4 論文前置研究 4
1-5 論文架構 5
第二章實驗理論 6
2-1 全像術 6
2-2 薄全像與厚全像 11
2-3 布拉格條件 15
2-4 耦合波理論 19
2-5 相位疊加法 33
2-6 相位疊加法之三維解析解 38
第三章峰值波長與頻譜分布模擬 43
3-1 光導系統之輸入輸出波長與頻寬分布 43
3-2 建立色散元件(VHOEd)之輸出波長分布 48
第四章實驗結果驗證 54
4-1 光導系統設計 56
4-1-1 光導系統之紀錄與影像重建 57
4-1-2 驗證光導系統輸出頻譜分布 65
4-2 針對輸入輸出效率優化之VHOEd設計 73
4-2-1 VHOEd設計方法 73
4-2-2 VHOEd之紀錄與重建 74
4-2-3 驗證VHOEd繞射頻譜分布 78
4-2-4 白光系統繞射效率量測 82
4-2-5 VHOEd系統繞射效率量測 86
4-2-6 VHOEd系統影像結果 88
4-3 緊湊型VHOEd系統設計 90
4-3-1 光機系統參數與繞射頻寬關係 90
4-3-2 緊湊型VHOEd設計 94
4-3-3 緊湊型VHOEd拍攝與重建 96
4-3-4 驗證緊湊型VHOEd繞射頻譜分布 100
4-3-5 緊湊型白光系統效率量測 103
4-3-6 緊湊型VHOEd系統效率量測 106
4-3-7 緊湊型VHOEd系統影像重建 110
4-4 光源寬度對繞射頻寬與系統效率影響 112
4-4-1 基於不同狹縫寬度之頻寬量測 112
4-4-2 基於不同狹縫寬度之效率量測 116
第五章結論 120
參考資料 123
中英文名詞對照表 128

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指導教授

余業緯(Yeh-Wei Yu)

審核日期

2024-8-12

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