本論文針對體積全像元件(Volume Holographic Optical Element, VHOE)對輸出影像造成色彩不均勻的現象進行評估與分析，透過模擬輸出影像的亮度與色度分布，並結合演算法優化輸入光源與VHOE的繞射效率分布。此研究的目標透過最佳化模擬找到一組最佳適配的光源與VHOE參數，提升輸出影像的亮度均勻性(Brightness Uniformity)與色彩均勻性(Chromaticity Uniformity)，以實現最廣色域(gamut)與最寬均勻視角的結果。 此研究主要建立了光源與VHOE高均勻度輸出影像的設計的方向，並設計光源限制方法擷取輸入光源，有效降低輸出影像色差表現，為未來設計光源與VHOE繞射效率分布時提供了參考依據。 此研究議題為本團隊首次對此現象進行的深入分析，最大效益在於提升輸出影像的亮度和色彩均勻性，對於未來頭戴式顯示裝置的設計與製作提供了有力的參考。 ;This study evaluates and analyzes the color non-uniformity in output images created by Volume Holographic Optical Elements (VHOEs). By simulating the distributions of brightness and chromaticity of the output image, and integrating algorithmic optimization for both the input light sources and the diffraction efficiency distribution of the VHOE, the research aims to determine the optimal combination of source and VHOE parameters. The goal is to enhance brightness uniformity and chromaticity uniformity of the output image, thereby achieving a wider color gamut and the broadest possible uniform viewing angle. The research establishes a systematic approach for designing high-uniformity output images through joint optimization of light source spectra and VHOE diffraction characteristics. A light source constraint method is proposed to effectively suppress color deviation in the output image. These findings provide a valuable reference for future designs of light source spectra and VHOE diffraction efficiency distributions. This is the first in-depth analysis conducted by our team on this phenomenon. The most significant contribution lies in improving brightness and color uniformity in the output image, offering practical insights for the future development of head-mounted display (HMD) systems.
