全視角40度自由曲面之準直鏡光學系統與可視穿光學系統設計應用於AR眼鏡顯示器

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題名:	全視角40度自由曲面之準直鏡光學系統與可視穿光學系統設計應用於AR眼鏡顯示器
作者:	廖偉皓;Liao, Wei-Hao
貢獻者:	光電科學與工程學系
關鍵詞:	AR眼鏡;自由曲面;codev;光學設計;AR Glasses;freeform surface;codev;Optical Design
日期:	2025-07-29
上傳時間:	2025-10-17 11:50:13 (UTC+8)
出版者:	國立中央大學
摘要:	在擴增實境（Augmented Reality, AR）顯示器的發展中，如何設計出具備大視場、良好成像品質與輕薄化結構的光學系統，一直是重要的研究課題。自由曲面（Freeform Surface）因其具備比傳統球面與非球面更高的自由度，在AR頭戴式顯示系統中展現出極大的設計潛力。透過自由曲面的靈活形狀控制，可有效校正像差、擴展視場角度，並優化光路的分佈，使之特別適用於複雜結構與非對稱光學系統的設計需求。本文提出一套基於自由曲面稜鏡的準直與可視穿光學系統，應用於AR眼鏡顯示器。主系統採用0.55吋、1920×1080解析度、單一畫素為6.34 m的微型顯示面板(OLED)，目標設計對角線全視角（FOV）為40度。準直鏡光學系統由一個自由曲面元件以及一片非球面鏡片所構成，可視穿光學系統則與主系統共用一個自由曲面元件，並且在後方附加上另一片自由曲面鏡片，其中準直光學系統用於實現顯示影像的準直，可視穿光學系統則結合穿透視野(see-through)修正功能，提供外界影像的視軸整合。準直光學系統設計的焦距為19.18 mm，光圈孔徑為4 mm，接目距離設定約為25 mm，以兼顧成像品質與觀察舒適性。本文以CODE V為設計軟體應用自由曲面參數調控與優化策略，專注於光學性能的最佳化設計。透過MTF（Modulation Transfer Function）與角分辨率等評估指標進行系統效能分析，以符合人眼解析度需求。最終設計顯示，該系統能提供高品質虛實影像融合能力，展現自由曲面在AR光學系統中的應用潛力。 ;In the development of augmented reality (AR) display systems, designing an optical system that provides a wide field of view, high image quality, and compact structure remains a significant research challenge. Freeform surfaces, due to their higher degrees of freedom compared to traditional spherical and aspherical surfaces, offer great potential in AR head-mounted display (HMD) designs. With flexible shape control, freeform surfaces can effectively correct optical aberrations, expand the field of view, and optimize light path distribution, making them particularly suitable for complex and asymmetric optical system designs. This study proposes a collimation and see-through optical system based on freeform prisms for use in AR glasses. The primary system employs a 0.55-inch OLED micro-display with a resolution of 1920×1080 and a pixel pitch of 6.34 μm, targeting a diagonal full field of view (FOV) of 40 degrees. The collimation optical system consists of a freeform surface and an aspheric mirror, while the see-through system shares the freeform component with the main system and incorporates an additional freeform surface at the rear. The collimation optics delivers the virtual image, while the see-through path corrects the real-world view and aligns the visual axes of virtual and real images. The designed focal length of the collimation optics is 19.18 mm, with a 4 mm aperture diameter and an eye relief of approximately 25 mm to balance image performance and user comfort. CODE V is used as the design platform, applying freeform parameter control and optimization strategies, with a focus on maximizing optical performance. System evaluation is conducted using Modulation Transfer Function (MTF) and angular resolution metrics to meet the visual acuity of the human eye. The final results demonstrate that the system provides high-quality fusion of virtual and real images, highlighting the potential of freeform optics in AR display applications.
顯示於類別:	[光電科學研究所] 博碩士論文

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