近年來由於近眼顯示器(Near-Eye Display，NED)技術的發展趨於成熟，許多公司紛紛推出相關應用產品，近眼顯示器的視角(Field of View，FOV)為評斷近眼顯示器的重要指標，本論文主要利用球面波前紀錄的體積全像片達到視角放大的效果，並配合透鏡陣列(Lens Array)的技術，實現在增加顯示器視角的同時增加眼盒(eye-box)，此技術可用於可視穿型混合實境(Mixed Reality，MR)顯示器以增加顯示器的可視範圍。 在此類顯示器當中，光導(Light Guide)扮演將影像傳遞的功能，利用透鏡的成像原理，在光導玻璃上設計可以讓光導系統輸出的影像具有視角放大功能的體積全像透鏡系統，改變體積全像片在記錄光波干涉條紋時球面波前的焦距，進而產生不同的視角放大倍率，再將同樣的體積全像透鏡系統依照等間距的方式製作成體積全像透鏡陣列，以增加眼盒。 在光導玻璃上利用體積全像片製作而成的光導系統和在光導玻璃上製作微透鏡結構相比，具有體積小、重量輕等優點，讓使用者在配戴近眼顯示器時可以有更優質的使用體驗。 ;In recent years, as Near-Eye Display (NED) technology has matured, many companies have launched related products. The Field of View (FOV) is a crucial metric for evaluating NEDs. This thesis primarily utilizes volume holograms recorded with spherical wavefronts to achieve FOV extension. Additionally, by incorporating lens array technology, it aims to increase the eye-box while expanding the display′s FOV. This technology can be applied to see-through Mixed Reality (MR) displays to enhance the visible range of the display. In such displays, light guides play a critical role in image transmission. Using the imaging principle of lenses, a volume holographic lens system is designed on light guide glass to provide FOV extension functionality. By altering the focal length of the spherical wavefronts when recording the interference fringes of the volume holograms, different FOV extension magnifications are produced. The same volume holographic lens systems are then fabricated into volume holographic lens arrays at regular intervals to increase the eye-box. Compared to micro-lens structures on light guide glass, light guide systems made using volume holograms have advantages such as smaller size and lighter weight. This ensures a superior user experience when wearing near-eye displays.
