光學像差對於全像儲存系統的影響

Abstract

本論文探討全像儲存系統中，成像系統光學像差對於儲存品質的影響。 根據像差理論，我們分別在同調照明與非同調照明情況下計算出資訊頁面 經過成像系統受像差影響後的影像，並將影像轉化為概率分布函數圖。接 著採用通訊系統的頻道模型理論，將概率分佈函數轉換成系統誤碼率與儲 存容量，以之做為評估儲存系統性能的參數。模擬中我們分別求出各種像 差單獨對系統誤碼率以及儲存容量之影響，並找出系統對該像差的最大容 忍度，最後比較各種像差的嚴重性。

In this thesis, we investigate the influence of optical aberrations on holographic data storage. By using aberration theory, we derive output images of the holographic storage system when coherent or incoherent light source be applied. Then, the corresponding probability density function (PDF) of output data could be found. Then, by use of PDF we apply the channel model of communication theory to find the bit error rate and storage capacity of data storage system, and thus to evaluate the quality of the system. In our simulation, the influence of each individual aberration was evaluated separately, and the tolerance of the aberrations in storage system was found.