體積全像光學元件之波長及角度選擇性;Wavelength and Angular Selectivity of Volume Holographic Optical Elements

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题名:	體積全像光學元件之波長及角度選擇性;Wavelength and Angular Selectivity of Volume Holographic Optical Elements
作者:	黃郁泓;Huang, Yu-Hong
贡献者:	光電科學與工程學系
关键词:	光學;全像;相位疊加法;布拉格;Optics;Holography;VOHIL;Bragg
日期:	2022-08-18
上传时间:	2022-10-04 11:13:02 (UTC+8)
出版者:	國立中央大學
摘要:	本論文主要利用相位疊加法建立體積全像光學元件的數值模型，探討角度偏移及波長偏移情況下的繞射特性，並以實驗結果與模擬結果相互驗證。我們以相位疊加法建立一個以兩道平面波干涉之模型，當使用觀測距離遠大於全像片厚度以及微小相位變化的近似條件下，我們可以推導出解析解，並將其用以分析繞射光點位置，並以實驗驗證模擬之準確性。然而當我們要探討波長容忍度相關問題時，解析解的數值分析結果將產生些微誤差，因此我們需要調整近似條件至只使用觀測距離遠大於全像片厚度之條件，可以模擬出正確的波長選擇性與角度選擇性，並使用模擬結果與實驗結果相互驗證。 ;This paper mainly uses the VOHIL to establish the numerical model of the volume holographic optical element, discusses the diffraction characteristics under the condition of angle shift and wavelength shift and validates each other with the experimental results and the simulation results. We use the VOHIL to establish a model with two plane waves interfering. When the observation distance is much larger than the thickness of the full image and the approximation of the phase change is being used, we can derive the analytical solution and use it to analyze the diffraction spot position while verifying the accuracy of the simulation with experiments. However, when we want to discuss the problems related to wavelength tolerance, the numerical analysis results of the analytical solution will be a slight error. Therefore, we need to adjust the approximation conditions so that it can be used under the suitable condition, which is, that the observation distance is much larger than the thickness of the full image. At this time, the correct wavelength selectivity and angle selectivity can be simulated and the simulation results and experimental results can be used to verify each other.
显示于类别:	[光電科學研究所] 博碩士論文

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