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標題: | 超穎透鏡設計之高解析度穿透式擴增實境眼鏡 High Density See-Through Augmented Reality Glasses by Metalenses |
作者: | 孫齊 Chi Sun |
指導教授: | 蘇國棟 Guo-Dung J. Su |
關鍵字: | 擴增實境眼鏡,超穎透鏡陣列,Micro-LED發散光準直,畫素排列,時域有限差分,近遠場轉換, AR glasses,metalens array,Micro-LED light collimation,pixels arrangement,finite difference time domain,near-to-far-field transformation, |
出版年 : | 2023 |
學位: | 碩士 |
摘要: | 擴增實境(AR)為當前革命性的顯示技術,無論學術界及業界都爭相研究與發展。然而,受限於製程及物理上的限制,目前並沒有能夠完全實現AR顯示器的方式。近年來,由於製程上的進步,學術界發展出有別於傳統厚透鏡的平面光學元件-超穎透鏡,以及微米型發光元件-Micro-LED。本篇論文藉由結合超穎透鏡以及Micro-LED的模擬,打造出輕薄的AR眼鏡,我們利用超穎透鏡陣列將Micro-LED陣列的發散光準直並且偏折進入瞳孔,而外界光線能夠通過超穎透鏡陣列的間隔進入人眼。在光學的模擬上,我們利用光線追跡(Ray Tracing)、時域有限差分(FDTD)以及近遠場轉換方法,進行超穎透鏡的設計與對於Micro-LED發散光的準直,然而,光線的準直效果會受限於超穎透鏡的尺寸大小,因此我們提高超穎透鏡的直徑以利於達成較理想的準直光。為了提高眼鏡的解析度,我們將多顆Micro-LED放置於一顆超穎透鏡底下,由於Micro-LED的擺放位置不同,會有光束偏折的問題,對此,我們利用python計算及優化Micro-LED的擺放位置,以及畫素的適當排列,讓光線能夠進入瞳孔並且整齊地排列於視網膜上。未來,將更進一步地提高眼鏡的解析度,並且深入探討超穎透鏡的像差以及效率問題,期許利用此方法設計出一支完善的AR眼鏡。 Augmented reality (AR) is a revolutionary display technology currently being heavily researched and developed by academia and industry. However, there is no way to fully realize AR displays due to process and physical limitations. In recent years, with technological advances, academia has developed flat optical components that differ from traditional thick lenses, such as metalenses. In addition, the small volume light-emitting element, such as Micro-LEDs. This paper combines metalenses with Micro-LEDs to create lightweight AR glasses. We use the metalens array to collimate and deflect the divergent light from the Micro-LED array into the pupil; simultaneously, external light passes through the gaps in the metalens array and enters the eyes. In optical simulations, we use ray tracing, finite-difference time-domain (FDTD), and near-to-far-field transformations to design metalenses and collimate the divergent light from the Micro-LEDs. However, the collimation effect of the light is limited by the size of the metalens, so we increase its diameter to achieve ideal collimated light. To improve the resolution of the glasses, we place multiple Micro-LEDs under one metalens. Since the placement of the micro-LEDs is different, there is a beam deflection problem. To solve this, we use Python to calculate and optimize the placement of the Micro-LEDs and the appropriate arrangement of pixels, allowing the light to enter the pupil and neatly align on the retina. In the future, we will further improve the glasses' resolution and investigate the metalenses' aberrations and efficiencies, hoping to use this method to design perfect AR glasses. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/88285 |
DOI: | 10.6342/NTU202302112 |
全文授權: | 同意授權(限校園內公開) |
顯示於系所單位: | 光電工程學研究所 |
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