出瞳成像對於使用體積全像光學元件的擴瞳光導之可視角分析

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姓名

林明威(Ming-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

出瞳成像對於使用體積全像光學元件的擴瞳光導之可視角分析
(Analysis of Field of View for Exit Pupil Expansion Light Guide using Volume Holographic Optical Elements by Exit Pupil Imaging)

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至系統瀏覽論文 (2029-8-1以後開放)

摘要(中)

當前市面所發表之頭戴式顯示器，主要遇到投影系統在使用者視角上的限制問題，同時需兼顧外觀及微型化的設計。因此，本文使用體積全像光學元件之光導設計來製作MR眼鏡，以達到頭戴式顯示器的輕量設計。
本論文主要的目的是分析使用具有擴瞳功能之一維光導系統時，所遇到的縱向可視角限制成因，並藉此替代二維擴瞳之縱向可視角放大。本文使用體積全像光學元件來製作一維光導，透過光導系統中各參數與出瞳成像的關係，來分析橫向及縱向可視角的影響成因，其中包括出瞳大小、波導厚度、光資訊在波導內之繞射角度、guiding distance等參數，透過實驗進行比較與驗證。

摘要(英)

Current commercially available head-mounted displays (HMDs) primarily face the limitation of projection systems in the user′s field of view (FOV) while also requiring a lightweight and compact design. Therefore, this paper employs a waveguide design based on volume holographic optical elements (VHOE) to fabricate MR glasses, achieving a lightweight design for head-mounted displays.
The main purpose of this paper is to analyze the causes of the vertical field of view (FOV) limitations encountered when using a one-dimensional light guide with exit pupil expansion, and to use this to replace the vertical field of view enlargement of two-dimensional exit pupil expansion. In this paper, a volume holographic optical element (VHOE) is used to fabricate a one-dimensional light guide. The relationship between the parameters in the light guide system and the exit pupil imaging is used to analyze the influencing factors of the horizontal and vertical FOV, including exit pupil size, waveguide thickness, diffraction angle of optical information in the waveguide, and guiding distance. The results are compared and verified by experiments.

關鍵字(中)

★ 可視角
★ 眼動範圍
★ 出瞳成像
★ 擴瞳技術
★ 體積全像光學元件

關鍵字(英)

★ Field of View(FOV)
★ Eye Box
★ Exit Pupil Imaging
★ Exit Pupil Expansion
★ Volume Holographic Optical Elements(VHOE)

論文目次

摘要 i
Abstract ii
致謝 iii
目錄 iv
圖目錄 vii
表目錄 xiii
第一章緒論 1
1-1 背景介紹 1
1-2 全像術簡介 4
1-3 研究動機 7
1-4 前置研究 8
1-5 論文架構 8
第二章實驗理論 9
2-1 薄全像與厚全像 9
2-2 布拉格條件 11
2-3 耦合波理論 14
2-4 相位疊加法 21
2-5 擴瞳技術 27
第三章系統分析 29
3-1 光導系統可視角分析 29
3-2 出瞳虛像及深度分析 31
3-2-1 VHOE2之寬度 33
3-2-2 出瞳大小 34
3-2-3 波導厚度 36
3-2-4 波導內繞射角度 38
3-2-5 Guiding Distance 40
3-2-6 Eye Relief 42
3-2-7 出瞳與光導間的距離 43
3-3 系統限制視角分析 44
3-4 Eye Box理論值計算 45
第四章實驗驗證與結果 47
4-1 無耦入透鏡情況下之出瞳虛像及深度分析之驗證 47
4-1-1 VHOE2之寬度 50
4-1-2 出瞳大小 52
4-1-3 波導內繞射角度 54
4-1-4 Guiding Distance 56
4-1-5 Eye Relief 58
4-1-6 出瞳與光導間的距離 61
4-2 系統限制視角分析之驗證 62
4-3 Eye Box理論值計算之驗證 66
4-4 球平耦入VHOE之光導設計 68
第五章結論 74
參考文獻 75
中英名詞對照表 79

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指導教授

余業緯(Yeh-Wei Yu)

審核日期

2024-8-15

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