本研究的目的是利用一片體積全像光學元件(Volume Holographic Optical Elements, VHOE)製作的穿透式光柵色散元件，取代原有的白光LED，以提升由兩片VHOE所組成之光導系統繞射效率。通過優化設計，不僅提高光導系統輸入輸出的能量轉換效率，還減少所有光學元件的能量損耗。 當光源在光導中傳遞時，由於體積全像片的特性，入射到全像片的角度公差會對應到不匹配的波長，從而產生濾波效應。為了解決此問題，本研究使用相位疊加法（VOHIL）理論模型來模擬光在光導系統中傳輸後的頻譜分布。根據模擬結果，將進行色散元件的模擬與設計，確保色散元件提供的頻譜分布與視野皆與光導系統匹配，以達到最佳能量利用率。此外，考慮到光在各元件之間的能量損耗，我們重新設計了色散元件，用以提高收光效率並縮短各元件之間的距離。最後，通過改變白光LED的發光寬度，降低色散元件的繞射頻寬，從而進一步優化光學系統的效率。 ;The study aims to use a transmission grating dispersion element made from a volume holographic optical element (VHOE) to replace the original white LED, enhancing the diffraction efficiency of a lightguide system composed of two VHOEs. Through optimized design, we not only improve the system′s efficiency but also minimize energy loss across all optical components. When light travels through the optical guide, the volume holographic plates cause filtering effects due to changes in the incident angle. To solve this, we used Volume Hologram Being an Integrator of the Lights Emitted from Elementary Light Source (VOHIL) model to simulate the spectral distribution in the system and designed the dispersion element to match the optical guide system for optimal performance. Additionally, we redesigned the dispersion element to improve light collection efficiency and reduce component distances, minimizing energy loss. Finally, we optimized system efficiency by adjusting the emitting area of the white LED to reduce the diffraction bandwidth of the dispersion element.
