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研究生:周俊翰
研究生(外文):Chun-Han Chou
論文名稱:微透鏡陣列應用於光場虛擬實境系統成像品質分析
論文名稱(外文):Light Field Virtual Reality System with Microlens Array Imaging Quality Analysis
指導教授:黃忠偉黃忠偉引用關係
指導教授(外文):Jong-Woei Whang
口試委員:黃忠偉趙涵捷郭重顯周純峰翁林仲陳省三陳建宇林瑞珠修芳仲
口試委員(外文):Jong-Woei WhangHan-Chieh ChaoChung-Hsien KuoShun-Fung ChiuLin-Chung WoungSheng-San ChengChien-Yu ChenJui-chu LinFang-Jung Shiou
口試日期:2018-01-29
學位類別:博士
校院名稱:國立臺灣科技大學
系所名稱:電子工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2018
畢業學年度:106
語文別:英文
論文頁數:85
中文關鍵詞:虛擬實境微透鏡陣列成像系統線追跡光場色散序列性追跡非續 列追跡
外文關鍵詞:Microlens arrayimaging systemsequentialnon-sequentialdiffraction elementslight fieldvirtual realitydispersion
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本篇論文展示了一光場虛擬實境系統設計,其系統僅需要一個顯示器,就可顯示一四維影像,並可提升穿戴時的舒適度、方便製造聚焦線索與降低成本等優點。在本論文中系統設計主要可以分為兩個部分,第一部分主要在分析不同形狀對於微透鏡陣列成像品質的影響。目前微透鏡陣列已廣泛應用於成像產品中,用於縮小系統體積、提升系統的可視角與擷取空間四維影像訊息等。而微透鏡陣列有許多不同形狀,最常見的為方型與圓型,但並沒人深入探討不同形狀對於微透鏡陣列成像品質的影響,因此,我們就在本論文中提出四種形狀的微透鏡陣列,分別為:方型、圓形、非球面方型與非球面圓型,討論各種形狀透鏡的成像品質。

第二部分將用第一部分最佳成像品質的形狀透鏡陣列進行光場虛擬實境系統的設計,此系統包含一顯示器、一混合透鏡與一透鏡組,我們提供了一硬體架構設計與優化過程,其優化過程分析圖表包含光斑圖、調製函數轉換圖、色差分析、賽德爾係數與輻照度圖。

透過這些分析過程可以讓我們所模擬設計的系統更貼近實際情況,避免造成模擬與實際製作時的差距,而此系統不僅縮小了系統體積、減少長期穿戴造成的眼睛疲勞、容易做出聚焦線索與方便製造立體影像等優點。
The paper describes a new light field virtual reality(VR) system’s key component development. The system includes a display, convex lens and hybrid lens. The hybrid lens is composed by aspherical microlens and diffraction element which is the key component in the system. We want to design a high image quality hybrid lens for the system. Firstly, we analyzed the different shapes of microlens array image quality. Microlens array are widely used in imaging systems to reduce systems sizes, extend the camera field of view, and capture the 3D objects information as well. Lenses in the array may have different shapes. The common shapes of microlens array is rectangular or circular. Different lens types have different aberration effects in the imaging systems, but people seldom discussed it. Therefore, we presented four different types of lenses: circular, rectangular, aspherical circular and aspherical rectangular, to analyze their effects on the image quality produced by the associated imaging system.
Secondly, we use the best image quality microlens array to the light field VR system from the first part simulation result. We present the system optimization process which include spot diagram, modulation transfer function(MTF), longitudinal aberration diagram, seidel aberration coefficients and irradiance map. These charts can help us comprehensive analysis the system of key component make it more perfect and closer practice situation. We use aspherical surface and diffraction to build hybrid lens which can correct primary aberration and chromatic dispersion. The system has the advantage of smaller size, low vergence-accommodation conflict, easy creation depth cue and stereo imaging.
摘要 I
Abstract III
Acknowledgment V
Table of contents VI
List of Figures VIII
List of Tables XII
Chapter 1 Introduction 1
1.1 Research background and motivation 1
1.2 Research objectives and contribution 7
1.3 Dissertation organization 9
Chapter 2 Principle of design and analysis charts 10
2.1 Basic optical theory 10
2.2 Principle of analysis charts 17
2.3 Aspherical surface 22
2.4 Diffraction element 23
Chapter 3 System design methodology 26
3.1 Different shapes of microlens array analysis methodology 26
3.2 Light Field VR system design methodology 28
Chapter 4 Light field VR system simulation 33
4.1 Simulation results of aberration analysis in different shapes of microlens array 33
4.1.1 Sequential optics simulation 33
4.1.2 Non-sequential optics simulation 46
4.1.3 Simulation result discussion 49
4.2 Simulation results of light field VR system 49
4.2.1 Achromatic Hybrid microlens design 50
4.2.2 Non-sequential simulation for image quality 55
4.2.3 Simulation results discussion 58
Chapter 5 Conclusions and results 59
5.1 Conclusions and results 59
5.2 Future work 61
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